Desk Catapult DIY. This is also the perfect gift to make to give to your Dad for Father’s Day! Now when he takes a break to launch a few pom-poms from his DIY catapult, he can think of you. Or better yet, maybe you can launch some pom-poms, too, and turn it into a contest! Kids. Family. Activities. Science. For Kids. Father Day. Gifts. Crafts. From Kids. From Daughter. Ideas.