This big Lauri set provides progressive challenges as children gain math skills. Self-correcting number puzzles may be used alone or combined with pegs for counting and math. And kids simply love these stacking pegs. * 55 Tall-Stacker Pegs (2-5/8" tall and 5 colors) * 10 Crepe Rubber number boards (7-3/4" long) * Heavy-duty plastic storage tub.