07/21/2026
JR's Mini Clinic Science Experiment: Pop π
- Add about 1 tbsp of cornstarch (and a few drops of food coloring if you want it to be extra messy!) into an empty 35mm film canister (available in bulk on Amazon)
- Fill the canister about halfway with water.
- Drop half an Alka-Seltzer tablet.
- Immediately snap the lid on tightly, shake the canister a few times, flip the canister upside down, & place it on a hard, flat surface (like a driveway).
- Step back and watch as the pressure builds, pops the canister into the air, & creates a colorful chalk splatter