Features: 1. Digital Transforming Robot. DIY Building Blocks Kits. Smooth surface, no burr, safe material, safe to play. 2. Simple mathematical operations. 5 kinds of operation symbols to easily learn addition/subtraction/multiplication/division, making the process of recognizing numbers become a mathematical game, no longer monotonous 3. Fun learning, happy cognition, turning numbers into games, learning is no longer monotonous 4. Combination of hand and brain, let children like to use their brains to imagine and build 5. Build all number blocks into a  robot, and each number blocks can be deformed individually Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Specification: Size: as picture show Material: plastic Package List: 1 x DIY number deformation building blocks