Brick Qty:651pcs

1. Precision gear linkage system

Pure mechanical structure, hand-cranking drive can simultaneously achieve the rotation of the Sun, the revolution and rotation of the Earth, and the orbit of the moon around the Earth, truly restoring the logic of celestial body movement.

2. The track is linked with the time scale

3. True astronomical tilt Angle restoration

The Earth is assembled according to the actual obliquity of the ecliptic Angle, and the causes of the four seasons can be understood at a glance. The accuracy of popular science is maximized.

4. It comes with a "CaDA Mini Classroom" and an independent parts package to learn three small structural knowledge points.