How to Make a Powerful Rubber Band Pen Gun! (Shooting Toy) In this video, we show you how to build a powerful Rubber Band Powered Pen Gun using simple materials at home! This is a fun and easy Science Working Model that demonstrates the principles of Elastic Potential Energy and projectile motion. This STEM project is perfect for kids and students who love DIY toys and creative engineering. It’s simple to make but performs amazingly well! 🚀 LIKE this video and SHARE it with your friends who lov