demonstrations:candy_camouflage
Candy Camouflage
Materials: ★☆☆ Easy to get from supermarket or hardware store
Difficulty: ★☆☆ Can be easily done by most teenagers
Safety: ★☆☆ Minimal safety procedures required
Categories: Ecology and Ecosystems, Natural Selection and Evolution
Alternative titles: M&M Predator–Prey Challenge
Summary
In this game, players act as predators hunting for M&M prey. Some candies are disguised with Skittles that represent poisonous animals. Through quick candy hunting, students discover how mimicry and camouflage help prey survive by tricking predators.
Procedure
- Wash hands so the candies remain clean and edible afterward.
- Prepare two bags of candy:
- Bag 1: 10 M&M’s of each color (yellow, blue, green, brown, red, orange) plus 10 red Skittles.
- Bag 2: 10 M&M’s of each color plus 10 yellow Skittles.
- Pour the contents of one bag into a pie tin or sturdy paper plate.
- Explain rules: Players (2–4) pretend to be birds with beaks (use pointer finger and thumb). They must collect M&M’s but avoid Skittles (poisonous prey).
- Set a timer for 20 seconds. On “Go,” predators collect as many M&M’s as possible using their “beak.”
- When the timer ends, stop hunting. Count and record the number of each candy collected, noting any Skittles accidentally picked up.
- Return candies to the bag and repeat with the second bag.
- After both rounds, compare results to see which M&M colors were avoided due to their similarity to Skittles.
Links
Candy Camouflage STEM Activity - Science Buddies:
📄 Candy Camouflage STEM Activity - Science Buddies: https://www.sciencebuddies.org/stem-activities/candy-camouflage
Variations
- Play multiple rounds to simulate natural selection: after each round, double the number of surviving M&M’s and continue.
- Use other candy types (Candy Corn, Nerds) to change camouflage difficulty.
- Show photos of camouflaged animals and time how long it takes for people to spot them.
- Try outdoors with natural objects (rocks, leaves, seeds) to mimic camouflage in habitats.
Safety Precautions
- Supervise young children to prevent choking on small candies.
- Remind players not to eat candy until the activity is finished.
- Ensure hands are washed before and after playing.
- Use sturdy containers to prevent candy spills.
Questions to Consider
- Which M&M colors were collected the least? Why? (They mimicked the poisonous Skittles.)
- How does mimicry increase survival in the wild? (Predators avoid prey that look like poisonous or dangerous animals.)
- What other camouflage strategies do animals use besides mimicry?
- What might happen to a predator population if prey develop effective camouflage?
- How does this game connect to real examples like Monarch and Viceroy butterflies?