Puzzles should challenge a child without frustrating him, so watch that the number of pieces and complexity of design are appropriate to his growing ability. Graphics for young children should be clear and bright. Pieces should fit and hold together well, come apart easily and be sturdy enough to withstand repeated use. Many skills are exercised by puzzles such as concentration, manual dexterity and the perception of shape, colour, size and form. Puzzles are, therefore, an excellent preparation for learning to read.