[header] How to build a motor [title] Wind wire around a cylindrical object like a pen or pencil cell. [step] This coil of wire will be the moving motor armature. If the wire is thick then the diameter of the coil should be larger. 
A thin wire with smaller coil diameter is recommended for beginners since it is easier to bend. Make approximately 30 loops in the coil so enough power can run through the electric motor.