The Logiblocs Spy Tech set is a great choice for kids interested in STEM. It features over 30 projects based on electronic blocks called Logiblocs. Create different kinds of detectors and alarm systems, and many more cool projects. Its a fantastic starter kit for the introduction to circuits and will help get younger children interested in basic coding. The chunky blocks are easy to assemble. Logiblocs is an electronic discovery system that helps children understand the world of technology that we live in. By plugging the blocs together, children can build control systems and various gadgets that are fun and useful! Pack size: 20.5 x 27 x 5cm (8.1 x 10.6 x 2 inches)Includes power base , button, light sensor, circuit bloc, NOT bloc, bleeper, recorder and detailed instructionsFeatures over 30 projects Suitable for ages five years and over Great for helping kids develop logic and cognitive skills Logiblocs Spy Tech