The mechanical transmission perpetual calendar is composed of many precision parts, and through the combination of multiple sets of gears, a beautiful perpetual calendar created by mechanical transmission is created
Built-in LED lights, adjustable volume (can be completely muted)
Sturdy bubble shell, easy to press, matte handle, easy to hold
Small size, can be held in the hand, easy to carry
It can reduce screen time for children, which is beneficial to develop their reaction ability, memory and logical thinking ability, improve finger flexibility, suitable for stress relief and sensory exploration