Easy Catapult/Slingshot From Old Bicycle Tube By severov in LivingKids9,160161Save PDFFavoriteIntroduction: Easy Catapult/Slingshot From Old Bicycle TubeBy severovseverov.net/FollowMore by the author: To make it you will need: 1) wooden fork 2) old bicycle tube 3) adhesive tape (optional)