A popsicle stick catapult is a simple and fun way to teach kids about physics. It's so easy to put together, with dollar store supplies or items you might already have in your cupboards. Within minutes, you can be experimenting with this simple machine. How to Make a Catapult with Popsicle Sticks The popsicle stick catapult is a classic science class activity for a reason. It's so simple to build, and it's so much fun to test out! I love any activity that gets kids learning while they enjoy themselves. Toddlers will simply be entertained by sending objects flying, but