As you fold laundry, give the socks to your toddler and ask her to help sort them into pairs. Explain that pairs are two of the same thing; they share some characteristics. Pair one of your toddler's socks with one of yours. Are they a pair? Why or why not? Matching develops logic and reasoning skills and is one of a toddler's first steps in math. You can also use this activity to discuss colors, shapes and sizes, for example: Find all the clothes that are white, or line up shirts from smallest to largest.