Stimulate imagination and creativity with the 4M KidzLabs Doorbell Making Kit. Complete an electric circuit for a working doorbell with this kit. Teach friends and family about converting electricity to physical movement. With a hangable loop at the top of the unit. Assemble the kit with a cross-head screwdriver and power with 2 AA batteries (sold separately). This kit is recommended for ages 8-15 with adult supervision.