This number puzzle presents the numerals 1 through 10 as interlocking pieces that children in early childhood match, sequence, and handle individually, supporting the integration of numeral recognition with one-to-one correspondence. The physical manipulation reinforces the child's developing ability to associate written symbols with quantity at the concrete level. It works well as an independent activity during the sensitive period for number and complements the broader numeration sequence without duplicating the function of the number rods or sandpaper numerals.