Make learning addition fun and easy with Easy Addition Fun-to-Know Puzzles from TREND. As students piece together self-checking 3-piece puzzles, they'll learn essential addition facts! Puzzles feature fun illustrations on one side and numbers on the reverse side, making these puzzles adaptable to different skill levels. The self-checking design also allows students in kindergarten through second grade to learn independently and gain confidence! Set includes 15 Easy Addition Fun-to-Know Puzzles.