This 4-in-1 kit shows you how to build four cool 3D light up structures without any wires! E-Blox® Power BloxTM patented technology uses tin plated parts that are conductive so you can connect them between the battery module and LED modules to add lights into any brick structure you can imagine and build. • 4 fun 3D light up designs with build guide and online instructions • All parts are fully compatible with other major brick brands • STEAM product that teaches how to build 3D circuits • Contains 46 parts including 9 unique conductive parts • two 2-way Green-Red LEDs, • 6 tin plated conductive parts • 1 Battery Module • Requires one 9-volt Battery not included • Ages 5 and up