Petri Dish Science and Art Craft: Original Lesson Plan

Petri Dish Science and Art Craft

Original lesson  for informal educational environments by Rachel P. Riendeau

First used at Knight Memorial Library's Science Craft Mania, July 21, 2014

Providence, RI

25 minute sessions

GATHER: Supplies for each student.

1/2 plastic Petri dish (via online suppliers) OR bottom of clear round plastic bottle/lid

1 circle, traced in petri dish, of 2-4mm thick craft foam sheet

1-3 toothpicks

1 washable cup

1 permanent marker

washable markers

PVA (Elmer's) glue

glitter OR glitter glue

color print outs of interesting bacterial growths on Petri dishes

sample of finished craft

optional: small items (flat back rhinestones, shapes punched from leftover foam, etc.), scissors (older students), long Q-tip/cotton swab (for demonstration)

SHARE: Briefly present to your students (about 5 minutes).

            Can you see all the germs on my arm?

            Neither can I. There's lots of good and bad germs on our skin, in our bodies, and in the world but they're too small to see with your eyes.  You need a microscope,. or you can see them when there are hundreds and hundreds living together in groups called COLONIES.

            Have you ever been to the doctors when your throat hurts and they take a long Q-tip like this (demonstrate) and swab the back of your throat? That's because they're taking some germs from your throat to see if any are STREP (Streptococcus pyogenes) germs.

            Scientists feed the germs, pouring different types of food, called AGAR or GROWTH MEDIA, into small clear plates called PETRI DISHES. Then they transfer the germs from the Q-tip to the food on the plate by STREAKING THE PLATE, like this. If the germs like to eat that kind of food in the Petri dish, they will grow into COLONIES, which look like dots, all colors and sizes.

            Today we're going to imagine what COLONIES of different germs look like. First put the AGAR, here, into the PETRI DISH. Then use your imagination and markers to draw colonies on the AGAR. Often, more than one kind of germ grows on a Petri dish by accident. This is called CONTAMINATION.  To make your Petri dish more interesting, contaminate it: make more than one kind of pattern. Finally, put glue and glitter on the toothpick to STREAK THE PLATE. You can also make glue dots or glue on different things like dots and gems to make more COLONIES.

            Be careful to only use a little glue when you streak the plate so it will dry. I will come around to label your Petri dish with your name and the name of your germ--remember STREP, for example-- when you're finished, so start thinking of a good name. Any questions? Okay, ready to grow some beautiful germs?

                                                                   

LEARN: Vocabulary list for fun, for the board or  a hand-out.

microbe         bacteria          Strep               microscope                colony                        Petri dish

agar                growth media           streak the plate        contamination         culture

microbiology

REPEAT: Guide with structured directions as needed (15-20 minutes).

1. Put your circle of agar, the foam, into your Petri dish. Glue it down if it isn't snug.

2. Draw patterns of dots, lines, squiggles, and other shapes with the markers on your agar. 

Remember, you can have more than one kind of bacteria on a contaminated plate, so be creative.

3. Squeeze some glitter glue into the washable cup. Take a toothpick, dip it in the glue, and carefully dot or drag it across your Petri dish to streak the plate. Make more patterns.

4. You can also use the toothpick to dab dots on glue on small, flat backed items  to stick  bigger colonies onto your Petri dish.

5. Let me know when you are done. I'll write the name of your germ(s) on the back of your Petri dish, as well as your initials and the date, with the permanent marker. This label reminds you  what and when the germs "grew," an important detail for real scientists.

6. Clean up.

 SHOW: Real life examples. Google Images has great ones, or send me a message for those I've found.                                  

EXAMPLES: Note that students left these behind because they did not like them, so these are not the most impressive examples from Craft Mania.

   

                                                 

SOURCES:  Websites featuring examples of different Petri dish art

http://thedailydish2013.blogspot.com/

http://roganbrown.com/section/327584.html

https://www.etsy.com/shop/artologica?section_id=12459411

http://flavorwire.com/214209/microbial-artists-use-bacteria-to-create

http://www.smithsonianmag.com/science-nature/colonies-of-growing-bacteria-make-psychedelic-art-22351157/?no-ist=

http://magical-contamination.tumblr.com/

https://www.etsy.com/shop/ELINart

http://anatomy-uk.com/2012/10/15/laura-katherine-mcmillan/

Architectural Salvage Easel

The Neoclassical half-column of a base for something- heavy potted plant, patio table, bird bath-- was abandoned curbside the next street over. I raced back to my house, jumped into the car, and wrestled the heavy wooden piece of architectural salvage into the trunk without a thought what to do with it. The feet are shaved off unevenly and the wood was a dirty sorry shade of gray so I scrubbed, sanded, and painted it with leftover red from my sister's bedroom. By the time a coat of clear weather-proofing Rustoleum, I had thought how to put its tilted design to good use.

An easel of course requires a broad surface so I practiced my novice carpenter skills with spare metal joiner plates, scrap wood, and screws. There are a few nails I couldn't drive in fully that I left for hooks, and to mark it one of my inaugural clumsy carpentry projects along with the extra holes drilled in slightly wrong places. Despite these mistakes, the easel top sits sturdily on the base.

 The ledge was another feat of salvage. I unscrewed the loose curving legs from a dilapidated wooden chair, another curbside trash day treasure, and affixed them to the broad wooden surface with metal plates and screws. The holes where the legs were attached to the rest of the chair with wooden pegs function as pencil or paintbrush holders. I think the shape of the legs complements the Neoclassical base well, if I do say so. Now I need only a stool, or to use a collapsible folding chair, to paint en plen air. 

Americana Burlap Fence Hangings

I cannot encourage people enough to check local farms and farm stands for raw materials like burlap first rather than trotting out to a craft store and paying four times the amount for a newly manufactured, characterless roll. I saved the designs on the burlap bags I purchased for a few bucks from a local farm since the bold graphics summoned images of undulating corn fields and other midwestern Americana. I stitched the burlap into old wire hangers which looped over fence pickets. The hangings brighten the gray fence for the summer.

This potato sack, depicting a tiny mustached man with a boater raised to greet others as he cruises by on a penny farthing. I find the name of the chemical "to prevent sprouting" that may have been used dissonant alongside this genteel illustration. 

Fairy Tale Cottage Earring Organizer from a Dumpstered Spice Rack

Of all the female accessories I've learned to adorn myself with, earrings have been the most difficult to organize. Unlike my necklaces, which can hang off anything- like these on pushpins which rim a little shelf- they come in pairs and have two little pieces to each on top of that which I constantly lose. I tried stretching lace between large embroidery hoops and hooking my collection there but the hoop was difficult to move around to get to the post earrings. All my jostling caused the whole contraption to explode after a week or so. 

Since, I' had my eyes peeled for something sturdier that can hang but which also has firmly affixed grids. When I peered into a dumpster down the street at a house being renovated to check out some wheels poking out, attached to ugly tray tables, I found a spice rack identical to this. After prying off the wheels, I absconded with the tiny cabinet, still full of 21 glass spice jars with unusual pinkish copper-colored screw lids. After scraping out mid-century spices and soaking the jars, I set them aside for  miniature thing storage in my future home. The rack itself reminded me of Snow White's or Briar Rose's cottages in the woods but it needed some work.

I didn't have hooks for the upper shelf so I flipped the cabinet upside down. Fortunately, the hook clasped still secured the doors shut this way.  I scrubbed down all surfaces with dish soap and warm water, dried, and then massaged in 3 coats of coconut oil to restore the wood. The hinges, long creased plastic pieces,  broke as I rubbed at the doors so I improved new ones with heavy duty fabric patches and upholstery tacks after a failed attempt with tiny salvaged shutter hinges. Thumbtacks and some staples held strips of lace--these salvaged from a thrift store wedding dress I purchased for the satin- over the back of each shelf. I tied a hammock for loose earring backs and holiday earrings for my final touch.

The bottom shelf had a different rod running along the back. I addressed the accessibility problems I previously experienced with post earrings by incorporating the rod into the design. I draped 3 pieces of lace vertically over the rod so I can easily lift them up to view and remove post earrings and their backs. User experience design on the fly!

The finished product! A fairy tale cottage earring organizer from a dumpster spice rack cleaned, polished, turned upside down, re-hinged (with a pop of turquoise, notice), laced, and hung (but rather haphazardly for now with some hanger wire. When I move this to my future home, I'll have a less conspicuous loop. I might paint the black grate off white someday too.) Earring storage solved for free.

Data Visualization: Using Anthropology and design on My Own Resume

All original work using the Windows Paint and Microsoft Word platforms, I visualized my resume, specifically for my research experience and education. I hope this will get me more interviews and, ultimately, a meaningful full-time job.

Upcycled Burlap Container Gardens, Part 1

Repurposed papasan chair container garden.  I stumbled upon a perfectly stable bamboo papasan chair while walking my puppy the day after seeing suggestions for its reuse as a container garden on Pinterest. Hoping for a more organized garden, I flipped the basket though my image search (albeit with aesthetic concave examples) suggests no one else has publicized such an innovation. I staple-gunned burlap and plastic mesh over the former chair seat opening and stabilized this since dirt is heavy with a Z of scrap wood nailed into the bamboo rim. I anticipate that the rings of bamboo will act to both trellis and compartmentalize the different plants inside. So far I experimented with corn, beans, and onions. (Notice the compost bin in the background of this photo? I installed the Earth Machine after a workshop session with a state resource recovery manager and a visit to my city's department of public works which subsidized my purchase, paying 50% of an already discounted product. Only $20 and a lot of discussion with my family to prevent food waste!

Burlap lined wire bicycle baskets for beans, squash, cukes, and nasturtium. Because the soil quality in New England can be poor, my compost know how was acquired very recently, and the neighborhood squirrel and rabbit populations have exploded, I wanted some of my veggies to be protected. Containers-- here from curbside reclaimed wire bike baskets with burlap from a local farm's corn and potato sacks (only $2 for 7 huge sacks!) sewn in with garden twine- let me take the higher ground in more ways than one in my struggles with pests and soil. The impromptu stake stick mini-fences to scare off bolder vegetarians take away from the rustic aggie charm in their primitivism, but I'd rather have several lines of defense. Salvaged wooden decor, rubbed down with coconut oil so the wood will resist the rain, serve as trellises. 

Cetacean Ocean T-shirt Quilt/Picnic Blanket.

Cetacean Ocean T-shirt Quilt/Picnic Blanket. I learned about slavery message blankets and crazy quilts during my college freshman interdisciplinary arts seminar on the African diaspora and its impact. While using scraps and remnants has not always been out of necessity, and was even in vogue among wealthy Victorians, the sentiment of reuse and folksy nostalgia remains popular today. Unlike many scrap t-shirt quilts, I restricted the color palette and theme of this one, capitalizing on my love of the ocean and elementary school fascination with our highly encephalized marine relatives, dolphins.  

Rock Pocket for Windy Picnics. I detailed my quilt with machine-quilted waves to complement the theme and the uneven pieces (caused, no doubt, by my novice and impatient quilting and sewing skill) as well as utilitarian pockets at each corner. Tucking rocks or kicked-off sneakers into the pockets prevents the wind from upsetting a blustery picnic. I also insulated it with a thrifted ugly black fleece blanket which otherwise would have hit the dumpster, I suspect. This project is thus tuned to its environment as a picnic cloth, thermal energy-saving as a blanket, and versatile as either of these or a folk art piece.