Trekbest 3D Magic Cube Puzzle Box Sequential Puzzles as Birthday Gift (Blue) Ideal birthday or Christmas gift for your kids and friends Ideal intelligent development toy and stress releasing tool This 3D puzzle has a difficulty level and is fun for puzzlers age 12 and up Material: Environment friendly ABS plastic Size: 8 x 8 x 8cm / 3.1x3.1x3.1in