This kit provides hours of fun and educational play. The colorful building blocks have electronic components in them that, when assembled properly, will make circuits that light different LEDs and a fiber optic tree and spin a motor and fan. There are 4 different projects to build, and all parts are compatible with other items in our Circuit Blox line to add even more fun to your building experience. Some of the fun projects you will build include a fiber optic tree and flying fan. The kit includes a push-button switch, color-changing LED, motor, fan!