Boys and girls will be amazed at how easy it is to create over 50 electronic circuits by simply following the step-by-step instructions. The perfect gift for children, without welds, is completely safe for young engineers, although adult supervision is recommended. Create a functional alarm, speaker, digital display and more with 21 components, including a touch-sensitive switch, light sensor, magnetic switch and light bulb. Requires 2 AA batteries, not included. Suitable for ages 8+ years.