An aquatic toy comprises a hollow, buoyant body having a discharge port formed therein. The locking cylinder has a pushing lug. The transmission and reception devices comprise a radio-frequency transmitterreceiver and a multiplicity of optical transmittersreceivers which are arranged in annular fashion around the radio-frequency transmitterreceiver. The second semiconductor element portion has at least one light-emitting region that emits light whose wavelength is different from the lights emitted by the light-emitting regions of the first semiconductor element portion. Also described are methods of making and using the apparatus. The matching items are presented to the user.