John O. (buzzby) - , reviewed Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices on + 6062 more book reviews
It's a shame that I didn't find this book until June 7th. To think that I spent a month and a half in May and June (after standardized testing) wondering what lesson plans I could create for my class of 4th graders....