This kit has is everything a child needs to build a simple electromagnet and learn how it works. It includes Alnico North/South bar magnet, wooden block, nail, screws, metal plates (key switch), five feet of insulated wire and instruction booklet. (6 volt battery not included.) 1 kit each, bundle of 3, 3 kitsThis kit has is everything a child needs to build a simple electromagnet and learn how it works. It includes Alnico North/South bar magnet, wooden block, nail, screws, metal plates (key switch), five feet of insulated wire and instruction booklet. (6 volt battery not included.) total