Teaches circuit logic in a fun way for children. Kept our 10 year old niece busy for hours. Simple instructions and pictures included. Great for the young or aspiring electrician as you build a circuit and then it lights a light or fires a siren/doorbell/etc. They build the circuit then apply power. If the circuit doesn’t work they get to troubleshoot what part they forgot to plug in. And it’s low voltage so no risk of shock for the kids.