Craft Stick Catapult - my awesome Cub Scout companion leader used this to teach Leave No Trace: need 7 sticks for outdoor code rules, and signature. Band 5 of the sticks, band 2 of the sticks. You rock, Kimberly P.
Marshmallow Catapult: I thought this would be a fun and great idea for students to make in class. The project of the marshmallow catapult incorporates both art and science.when you can't buy them all a marshmallow gun!
How to: Build a Mini Catapult from Office Supplies