You can easily experiment with electromagnetic strength comparison tests. Follow instructions with checklist to build while learning. Instructions included for easy building from elementary school students. You can experiment with a variety of comparisons of items that are wound by yourself.

200 coils are pre-treated and included. Makes an auto-start motor. Comes with a compass needle Uses iron shingand nails that do not leave a magnetic residue, so you can test it in a stable manner. Main experiments include working current, electromagnetic poles, electromagnetic strength and current, electromagnetic strength and number of electromagnets. You can assemble the basic set and assemble the fan components to create simple starches.