All Shashibo magnetic puzzle cubes are made of high-quality injection mold plastic, tear-resistant stickers, and have 36 internal ultra strong magnets enclosed within each cube! Combine 2 or more Shashibo to build larger shapes and create more possibilities. Can you master the shape shifting box? This top-selling & STEAM accredited, award winning puzzle toy is a great way to boost creativity, relax and get away from technology.