These blank puzzles can be used for artwork, leisure time activities, group projects, visual aids. The puzzles can be filled in with drawings or messages done with crayons, pens, watercolors, felt-tip markers, etc., or rubber stamped. These puzzles are made of heavy weight cardboard, glossy white on front and matte white on reverse side. Puzzles can be sealed with shellac or Mod-podge and displayed, or broken up and mailed to be assembled by the recipient. 28 piece puzzle.