Make easy airsoft grenades with a few easy-to-get supplies. First, you'll need an easter egg, airsoft bbs, a fire cracker, tape, and a knife. Start off by poking a hole at the top of the easter egg. Then poke the fuse from the fire cracker through the hole. Fill the other half of the egg with bbs (I prefer .12g because they are cheaper and lighter). Close the two ends and tape around so it won't open when you throw it.