Whittlewud Number & Math Sign Puzzle Board, This wooden Board Contains 0-20 digits & Math sign. Wooden Number Blocks Math Counting Shape Sorter Puzzle Board Montessori Toys for Toddlers.Play & Learn Number and Sign: Our number blocks are bright & clear, can develop kid's the sensitivity of the reading & writing, Baby can sort, stack and learn to identify sign and count the number. it can increase the baby's ability of creativity.