Two component battery holder for use with Eisco BKEPH2014 - Elementary Basic Electricity Kit and Eisco BKEPH2010 Comprehensive Basic Electricity Kit. Battery not included. Mounted on high quality plastic blue base with two 4mm sockets. When combined with elementary basic electricity kit, provides an introduction to basic circuitry for young students. Can be used (in conjunction with other items) to show the principles of lighting a lamp, using a switch, lamps in series and parallel, using motors, heat from electricity and more.