Perfect for students, engineers, teachers, or curious minds.The kinetic globe consists of inner and outer rotating spheres. The wind-up rubber-band engine makes the spheres move around the axis in opposite directions. Eco-friendly sustainable material made of FSC-certified wood. Very high precision with laser-cut plywood with amazing details. All-inclusive boxes, self-assembly. No messy glue is required. Clear colorful step-by-step assembly instructions. The model includes candle wax for gears, sandpaper, and rubber bands. Very sturdy construction.