The Magician's Catapult

Each group needs:

• 11 Popsicle® sticks
• 1 tongue depressor
• Hot glue sticks and glue gun
• 1 drinking straw (non-flexible)
• 1 wooden dowel, with diameter smaller than straw, but not shorter than popsicle stick
• 1 small rubber band
• 6-8 grapes