This kit is one of a number of kits aimed at giving children hands on experiments with electronics. It includes a battery holder, 2 capacitors, 2 resistors, 1 pot, 2 bipolar transistors, 2 leds, speaker, mike, motor, a variety of switches, 4 "IC's" and a few other parts.
What Makes a Magnet? constitutes a fairly substantial introduction to magnets for children approximately ages 5 to 9. They are invited to do a little discovery for themselves by doing some "fishing" with a magnet in a box of miscellaneous objects and see what things the magnet will pick up. The book goes on to explain that magnets pick up, not everything made of metal, but objects which contain iron in particular.
A very simple children's book designed to explain how electricity works and how it is harnessed to be used in everyday life. The thing my husband (the electrical engineer) liked about this book was that it, quite simply, doesn't have any flaws. It is simple, but substantive.