Handheld Manual Fan Gear Drive 5 Speed DIY Mechanical Explore Science Model Toy Kit

Description:
Explore basic mechanical principles such as gears an axles through five hand fan models. This set enable children to build fans by combine axles and different sizes of gears, to explore the speed of different output.
Features:
1. 5 Different speed combination to learnthe principle of gear transmission
2. Colorful parts and easy to assemble.
3. Instructions shown on the box
4. Box Size: 20x17x7cm
Build and Learn: 1. Different sizes of gears can be used to change the output speed. 2. When the big gear drives the small gear, the output speed of the small gear will increase. 3. When the small gear drives the big gear, the output speed of the big gear will be reduced. 4. The two gears bite and drive, the directions of these two gears are opposite. 5. The gear must be fixed in a position that can rotate freely, and it achieve by a gear axle.

Warning:Chocking hazard contains small parts. Not intended for children under 3 years. Please use it accompany with adult, and keep the package for future reference. Maintenance method:Can be sterilized and washed, keep far away from the high PH, high temperature and damp place.

Package Included:
1 x Handheld Manual Gear Fan Science Kit