Principle: the coil is energized to generate a magnetic field, and the same sex repels each other. When the magnets adsorbed on both ends of the battery enter the coil, a magnetic field is generated in the coil, which attracts and repels with the electromagnet, and the battery can move quickly.
Suitable for children over 6 years old
Material: Copper
Package included:1 coil, 1 battery, 4 magnets with box
It contains a small magnet. Please do not swallow it. Please use it under the guidance of your parents. Not suitable for children under 3 years old