Abstract: In an electronic experimenting kit an insulating base is provided on the one surface thereof with two rims and between said rims with grooves inside which are mounted conductors. Electronic components are each mounted on a plate with the terminals thereof connected to conductors mounted on said plate. The rims are provided with grooves into which the plates are slid by the ends thereof. The plates are retained in position by springs which also provide the electrical connection between a base-mounted conductor and a plate-mounted conductor.