10 puzzles with easy-grip, raised pieces; each measures 7 1/2″ x 10″. As children piece together our fun-filled puzzles, they get involving, hands-on practice with numbers 1-10! Each self-correcting puzzle represents a different number—with a big numeral piece, plus a corresponding number of objects for children to count. Children simply place the chunky pieces into each hardwood board, building number recognition and mastering one-to-one correspondence as they play! Grade R-3 Ages 2-5 Years.