This Montessori math toy is designed to grow with your child. Our beginning math toy set is not just a number puzzle for counting & number recognition for toddlers, but a more advanced kindergarten math material that teaches basic arithmetic to 4-6 year olds! MASTER NUMBER SENSE: Learn counting, addition, subtraction, & place value with this number toy set. Our number peg board set helps develop one-on-one correspondence between the written number and its value. Children learn how to count as they place each peg into the hole. They then have the opportunity to match, re-order, and test themselves. MULTI-AGE LEARNING: Toddlers learn counting from this number puzzle while preschoolers and kindergarteners explore how to add & subtract up to number 20. Our toy is inspired by Montessori practices, combining the aesthetic + tactile learning + a self-exploratory & corrective design. Designed to fit into your library of Montessori toys for toddlers & up.