We have seen many kids enjoy this project. Not only do they like the loud pop and seeing their rockets go up, they take great pride in building their own rocket.
The rocket can be just for fun or can be a great opportunity to learn / discuss some science.
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Step 1: Materials
Effervescent tablet like Alka-Seltzer. Generic works fine.
Typing paper (any paper will do)
Markers, colored pencils, crayons
Something round to trace
Vinegar and baking soda can be substituted for the Alka-Seltzer and water. We just like to use the tablets for ease.
Step 2: Preparing Pieces
Take the paper and wrap in once around the canister. Elephant/giraffe, hotdog/hamburger, tall/short doesn't matter. Mark where the paper overlaps about 1/4 inch. Draw a straight line up the paper. Cut the paper on straight line. Hold on to both pieces of cut paper. The piece of paper that will be wrapped around the canister can be decorated.