Coolplay DIY 3D Crystal Puzzle Assembly Goat Model Educational Toys for Children (Clear) The Goat 3D Crystal Puzzle Blocks from Coolplay is a sleek, translucent, crystalline puzzle with 51 unique interlocking pieces Enjoyable to work on, challenging to complete, fun to display Delight your mind and eyes,beautiful enough to adorn any room This 3D puzzle has a difficulty level of 3 and is fun for puzzlers age 14 and up Approximate assembled size =10 X 11.5 X 3.5 cm (3.94'' X4.53 '' X 1.38'')