100+ Circuit Science is an electric circuit experiment kit that allows children to learn realistic concepts of electronics and electricity via play. Connecting electric wires to form different circuits will result in different electric functions. All electronic components are preassembled on the board. Simply bend the spring terminals over and insert the wires to make connections. The manual shows more than 100 exciting educational experiments. Once they get started, children will be able to build their understanding through play and experimenting. When children grasp the basics, they can even try out other interesting experiments on their own. Connecting them properly with resistors, transistors, capacitors, or other intermediate components can come up with even more varieties. It is important to note this is not a one-time experiment. The more young engineers spend on building the experiments, the better knowledge they will gain. They will never get bored, but totally engaged as they will discover more new and exciting experiments. Amazing Toys enable children to learn about electronic components, circuits, and theories as well as the basic electronic principles of electricity, voltage, current, resistance, and magnetism. Simply follow the number sequence in the instruction manual to connect the wire that allows them to do more than 100 exciting educational experiments, including flying fan, AM/FM radio, LED light, floating ball, bell, color filter, as well as sound control, magnetic control, touch control, and light control functions. To operate this product requires 4 AA batteries, not included.