Explore simple machines and create a catapult using simple materials. Explore simple machines and create a catapult using these simple materials: popsicle sticks, marshmallows, spoon, and rubber ...

Shaler Journal Catapult design challenge inspires Burchfield Elementary students Paul Guggenheimer | Friday, May 19, 2023 7:01 a.m.

Aakyriah Williams, 13, carefully tests her catapult as she joins in the fun at the Go Ballistic mini-catapult challenge Wednesday at Centennial Library, 2227 23rd Ave. in Greeley. The event was open ...