A model of the simplest D.C. elctric motor having two pole armature wound with enamelled copper wire, and permanent magnetic field provided by removable Alnico magnet. The construction is completely open and all components are readily observable, main body one piece cast aluminium and connections through phosphor-bronze strips is by means of a pair of 4mm sockets. Operatable on 4 to 8V DC. Height 125mm. Tripolar and four polar types are also available.