Electronic toy building kits comprising circuit boards, wires, transistors, diodes, capacitors, inductors, and/or resistors and power supplies, lights, sirens, electronic sound emitters

Sound players; Circuit boards; Components for electronic circuits; Electronic circuits; Electric wires; Transistors (electronic); Diodes; Light emitting diodes (LED); Capacitors; Inductors (electricity); Resistors; Electric power supply units; Power sources (batteries); Light exposure apparatus; Electronic components; Science sets for children being instructional apparatus; Science sets for children being teaching apparatus