Simple Atwood Machine, include Apparatus and 2 pulleys connected by a rod, 1.75inch plastic pulleys connected to a 3inch rod, Overall length is 8.25inch, Two pulleys are connected by a metal rod.
Stem Explorations- Swing Ride Building Set, includes over 470 parts plus a battery-powered motor for a single child or team of 2-3 children to build a working Swing Ride, plus 2 additional models: a Ferris Wheel and a Boom Ride, downloadable booklet guide
Stem Explorations- Rollercoaster Building Set, includes over 500 parts plus a battery-powered motor for a single child or team of 2-3 children to build a working Roller Coaster, plus 2 additional models: Ramp and a Half-Pipe, downloadable booklet guide