Interlocking cubes Comes with the solutions to this 9 in 1 mini puzzles set. Package includes one Star Puzzle, one burr puzzle, one wooden Ball Puzzle, one pyramid puzzle etc. Each Wooden Lock Jigsaws size is at 1.3x1.5 inches. The brain teasers 3D Mind puzzles Set are well constructed and durable. The quality is great and the pieces are flawless. Both wood puzzles have held up nicely. Buy them as a challenge, also works as a great toy. A handheld game that cultivate critical and creative thinking! Not only does this brain puzzles keep you entertained but it's a great way to help improving focus and concentration in kids and teens as well as improve their IQ and EQ. ach puzzle has a separate level of difficulty. It is suitable for kids to seniors. With nine different puzzles, this puzzle game is very interactive yet also works with individual players. Lots of fun to play with family and friends and compete who can disentangle the puzzle first! If you want something that would stimulate mind as well as keep hands busy unlike the spinners and cubes. These brain busters have worked wonderfully. Small enough to carry in pocket and complex enough to keep busy for while.