The Bombs Bursting In Air......

Gramps, a.k.a. the science guy, built some rockets and launched them with his students. He had some left over rockets and being the good Gramps that he is, he let the kids launch some too. They are made of water bottles and a few other supplies. You have to pump air into a special launch pad that the water bottle sits on. Then you count down and pull the string and watch them fly! Here are a few pics.