The hot wires 039plug and play electronic set039 is best described as an electrical meccano setsupplied in a bumper sized box even the anticipation from the size and exciting design on the box will not disappoint inside you will find a fantastic electronics set consisting of a transparent base board which is the assembly work station and over 100 numbered componentssupplied are in the kit are connectors buzzer touch plate switches photo resistor leds battery units loud speake