Pegs Included: 25 wooden round pegs, each 25 mm thick, graded into 5 distinct heights (e.g., 2″, 3″, 4″, 5″, 6″), with 5 pegs of each

Peg Heights: Varying sizes to promote depth perception (typically 5 size gradations) 

Colors: Distinct bright color per height (e.g., red, green, blue, yellow, black) for visual differentiation

Material: Laminated wooden board with smooth finish; solid hardwood pegs with enamel or painted surfaces