Top left: 24 pieces The back of the top left backing board is dirty. Top right: 30 pieces The bottom three are puzzles as well as backing boards, so they can be connected. (10 pieces - 20 pieces) The backing boards of the top left and bottom center are slightly warped, but the puzzles themselves can be played with without any problems. Toddler, puzzle, educational, educational toy, 1 year old, 2 years old, 3 years old, 4 years old, 5 years old, nursery school, kindergarten, welfare