These scaled wooden blocks make abstract math concepts easy for children to grasp. The relationship between numbers becomes tangible every time your child plays. 11" wide x 12" deep x 0.5" thick Made with wood veneers, painted with nontoxic paint. Each of the unit pieces represents a number, 1 through 10. Each unit piece has the numeral on one side, e.g., 1 and the corresponding spelled-out word on the other, e.g., one. Set of 20 puzzle pieces. Ages 2 and up.