19 holds, S=10, M=9, really nice, a smiley, turtoise, ship and much more lovely shapes, comes in mixed colors

26 holds, S=26, the best way to learn letters is to have them in your hands, comes in mixed colors

15 holds, XS=5, S=10, not only numbers but signs also means you can climb for example 2 + 4 = 6, so lets play math!