Your kids will be so happy playing this game! It’s entertaining, funny and original! You will need film canisters, corn starch, water, a black marker, alka seltzer and stir stick. Begin by drawing ghost faces on your film canisters. Once dry add a bit of corn starch to each film canister and then fill roughly 1/3 of the way with water. Then stir well. The corn starch and water mixture is essentially homemade sidewalk paint without the added color. Then it is time to play! Take a piece of alka seltzer and break it into pieces. Then quickly drop it in the canister, put the lid on, flip the rocket over, set it down and stand back.