Today's activity is not really a craft so much but it sure was fun. We launched balloons with a long book balanced on a hand weight. On one end we put the balloon and on the other we smacked down our hands, feet, weight, or whatever else we could find to launch that balloon up. To get your balloon to go up, up, up! make the end of the board longer on that side and drop a weight on the other. A great way to spend some time on a gross indoor kind of day and recall some of those high school physics classes (you know, if you missed them). Go fulcrums!