This is an amazing 3D challenge and way to encourage the development of your child��s.Puzzle Ball is an addictive sphere of layers that kids love to take apart and put back together. Boosts problem solving， motor skills and hand-eye coordination.Plus， kids can race against the clock or each other!For age 5 years and up.Outter ball is 3.35 inch diameterFeature:The 3D Magic puzzle maze you can't put down! -- this self-contained puzzle ball is a challenging maze for all age.Puzzle ball is a 3d spherical puzzle toy ， which inspired all ages child challenge it ， fromthis layer sphere down one layer sphere ， you need to get the correct position ， one layergradually go imbibitions ， last piecing together a complete sphere .Package Inclduing:1 X 3D Magic Puzzle ball