Pi Day, March 14, celebrates math. Money math is a favorite with kids. They love play money. Kids learn math skills pretending grocery store or consumer math. Interacting with play money, children learn to count, add, subtract, multiply, divide and skip count by fives, tens and twenty-five. Making change teaches counting backwards.Free printable play money, consumer math printables, banking and checking games - Grand Rapids Holidays | Examiner.com