Explore the wonders of physics and engineering with the Kinetic Globe 3D Wooden STEM Construction Kit. Ideal for students, engineers, teachers, or anyone with a curious mind, this kit features inner and outer rotating spheres powered by a wind-up rubber-band engine. Watch as the spheres move around the axis in opposite directions, creating a mesmerizing and educational display of kinetic energy. This hands-on kit is fun to build and a great way to learn about mechanics, motion, and design. Eco-friendly 3D STEM model to assemble and customize at school or home. Model may include candle wax for gears, sandpaper, and rubber bands when relevant. Features sturdy construction and high-precision laser-cut plywood with amazing details. All-inclusive box for self-assembly.Details:Natural woodPackage measures 6.3" x 5.2" x 9.9"Eco-friendly sustainable plywoodNo glue requiredInner and outer rotating spheresWind-up rubber-band engineIncludes assembly instructionsCandle wax, sandpaper, and rubber bands included when relevantAll-inclusive self-assembly kitTotal 205 pieces puzzleRecommended for ages 14+