Film Canister Rockets

Here is a fun little science experiment/activity!

FILM CANISTER ROCKETS

Material:
35 mm plastic film canisters. (Fuji brand works best.)
Alka Seltzer tabs
Water
Fill the canister about 1/3 full with water.
Add a quarter of an Alka Seltzer tab.
Quickly place the lid on the canister, make sure it's on tight and place - lid side down - on a flat surface. Stand back and watch. About 5-10 seconds later the pressure of the released carbon dioxide will blast the lid off and shoot the canister about a dozen feet high.
Great outdoor project!!
You can experiment with more or less water to see what works best!

Have fun!