a few fun things
1 youll need gel caps calcium carbide liquid soap, and water for this
fill 1 gel cap with calcium carbide(aka bangsite i belive) set that aside, then make a LAYER of soap on top of the water then place the gel cap in the water and watch all the bubbles form, then if you really want you can make a loud bang by "safely" trowing a match into the bubbles
OR
grind up some KNO3 and sugar (2-1) and watch all the lilac flames and smoke pour out upon ignition, if its contained well enough this can be use in small cannons
OR
you could make a hails rocket which use inline fins which are curved to spin the rocket giving it stabillity
