WHY CHOOSE ROXENDA SPEED CUBE SET? Improve child’s grip, hand-eye coordination, vision. Release people’s life and work pressure. Exercising elderly people brain, improving memory and practicing hands-on dexterity skills. Specifications: ❉Cube Size: 2x2x2: 50 x 50 x 50mm 3x3x3: 56 x 56 x 56mm 4x4x4: 60 x 60 x 60mm Pyramid: 95 x 95 x 95mm Megaminx: 72 x 72 x 72mm Windmill: 56 x 56 x 56mm Mirror: 56 x 56 x 56mm ❉Material: ABS material ❤What’s in the Box? 1 * 2×2 Speed Cube 1 * 3×3 Speed Cube 1 * 4×4 Speed Cube 1 * Pyramid Cube 1 * Megaminx Cube 1 * Windmill Cube 1 * Mirror Cube 1 * Solution Guide Tips 1use the cube is made up of small parts so as not to hurt after breaking, the children under 3 years old play it that need to be accompanied by their parents. 2e cubes can be disassembled, but beginners should not try to open it, so as to avoid unrecoverable. 3 cubes may have a little lubricant above for lubricating, this is normal. Please wipe it up and be assured that it’s harmless to people. When you screw it hard, you can try lube.