Build, learn, and create more with the Cubelets Curiosity Set. Open a box of little robot blocks that will intrigue, fascinate, and inspire builders for hours on end. You’ve never seen building blocks like these. Cubelets make it easier than ever to explore robotics, coding, and other big ideas. Make more robots with the Curiosity Set. The Cubelets Curiosity Set expands your robot building horizons with 10 SENSE, THINK, and ACT Cubelets, as well as the Bluetooth Hat. Use the Bluetooth Hat to pair with the free iOS, Android, and FireOS compatible companion app to remote control robots or change the way your Cubelets behave. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.