For my son's birthday I built this launcher using plans from Make:Projects. One shot from our driveway went about 150 feet up. I was pretty surprised. Tomorrow we take it to the park to see what she's really got.
“If you want to build a ship, don't drum up people together to collect wood and don't assign them tasks and work, but rather teach them to long for the endless immensity of the sea” Antoine de Saint-Exupery