Toys, Games and Hobby Products Design The pipe circuit Building Toy by Yang Zhang The water pipe circuit provides a new experience for electrical beginners: simple, intuitive and clear. Using the flow of water as an analogy to the flow of electricity, towering battery boxes power the circuit like water towers. We package each electronic component in an independent module, and mark it with silkscreen and lamp on the module shell. Unified module interface, with the way of splicing blocks so that all kinds of electronic components can be arbitrarily combined. Learning circuit will no longer be confused by the messy panel, also avoid the difficulty and danger