- Explore our solar system as you build a mechanical model of the sun and 8 planets, also known as an orrey
- Learn how the gears and wind-up mechanism work to spin the model in this plastic snap together complex machine
- Dress each planet with colorful, detailed realistic graphics
- Discover how a special planetary gear is used to simulate the motion of the solar system
- Planets revolve at different speeds according to their different gear ratios
- Learn about the order of the planets and their relative size
- Full-color step-by-step illustrated assembly instructions included
- No batteries necessary
- Ages 6+
