Number, alphabet, three-dimensional puzzle Let your baby know the numbers, letters, and colors on the puzzle, then take out all the numbers on the puzzle, and shuffle them. Let the baby return all the letters by according to the shape of the empty space. The board is thick enough and with big blocks that is safe for little Develop brains and develop manual brain skills, encourages hand-eye coordination and imaginative play.Material: Wooden Environmentally friendly materials, food-grade guarantee, all-round and meticulous polishing, make babies safer, and mothers more at ease.