Build classroom unity and teach kids they all fit together perfectly like a puzzle. A great addition to arts & crafts activity, each of these puzzle pieces can be made stunning with sand. Simply peel off the protective covering one section at a time to reveal an adhesive surface, then sprinkle on colored sand. For use with bulk craft sand, sold separately. Give one to each student, then fit all the pieces together to create a display you'll want to keep up all season long! Cardboard. (30 pcs. per set) 11.4cm x 12.1cm ; assembled, 62.2cm x 59.7cm .