Craft Stick Catapult - I made 4 of these in 5 minutes and they work great! You need craft sticks, 4 rubber bands, hot glue or tape, and a bottle cap (I cut apart an egg carton because I didn't have any bottle caps).
Star Wars costumes are going to be a huge hit this year with the news of Star Wars Land from Disney. May the force be with you with these DIY light sabers you can make yourself! The kids are going to want to play with this all year round.