Take the now emptied and rinsed 2 liter and fill half full of vinegar. Take a cheap paper towel and place 1TB of baking soda in the center and make a little bundle. Shove the bundle down into the bottle and then quickly add a ballon and TADA...
We took these items:
(a white file canister, construction paper cut itno a circle with a slit cut half way through it, a rectangle, and 3 triangels, and a alka seltzer)
and we made these:
You fill the film canister about 1/3 full of water add an alka seltzer and quickly put the lid on it "blasts off" in between 10-25 ft!!!
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