Selection of magnets and materials, assembled in a plastic tray with cardboard sleeve. Includes 2 x alnico bars, 3 x alnico button magnets, 5 x ferrite blocks, 5 x ferrite rings, 1 x chrome steel horseshoe magnet, 1 x alnico horseshoe magnet, coloured squares of magnetic rubber, 2 x double-sided plotting compasses (19mm), 2 x plotting compasses (14.5mm), 2 x chrome rod magnets and 4 x ferrite bar magnets* (40mm). *Magnetic Lodestone Substitution The naturally occurring mineral normally supplied with this kit has been in short supply for several years now and our supplies are totally exhausted. We have substituted this component with general classroom magnets (4 x ferrite bar magnets) which we hope will prove useful. In the meantime, our sincere apologies for any inconvenience caused. Supports the following areas of learning:. Understanding the World - magnetism.