I wouldn't describe this just as a toy one would give a child to play with. It's a serious educational tool to demonstrate the principles of electromagnetic induction. Connect both terminals in parallel with a 6 volt battery to make an electromagnet with the north pole on one end and the south on the other. The electromagnet has decent strength but it's not a super magnet.
You can also connect one set of terminals to the battery and the other to a galvanometer to demonstrate Faraday's Law and a rudimentary transformer. Disconnecting one terminal from the battery and leaving it connected to the galvanometer while moving a magnet around the coil is a neat way to demonstrate how an electric generator works. On each solenoid, there is a bright red conduit tubing indicating the direction of the windings. This proves useful when studying Lenz's Law. Whether you are a Physics teacher, a student looking for a science fair project or just someone wanting to experiment, learn or review the fundamentals of electromagnetic induction, this is an excellent tool.
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