I've been reading the GeekDad blog recently, looking for cool ideas of things to do with my kids this summer. I came across their entry for making soda bottle water rockets. It looked simple, cheap, and fun. So we hopped over to Wal-Mart to buy a bike pump and an inner-tube. It took us a bit, but Ann and I finally built a cork that would fit snugly in the bottle. We were sorta testing it out and, uh, well, we accidentally launched in the kitchen. Ooops. Got water everywhere. But it worked! I can't wait till we try it outside tomorrow.