⭐ NGSS Aligned STEM Activity | Printable, Digital, & Fully Editable | Updated for 2026Engage your students with this high-interest engineering challenge where they explore elastic potential energy and projectile motion. In this hands-on lab, students design and build a catapult using popsicle sticks, rubber bands, and a bottle cap to launch a mini marshmallow as far as possible. It is the perfect addition to any Elementary Physical Science, Energy, or Forces and Motion unit. Designed specific