TREND enterprises, Inc. Opposites Fun-to-Know Puzzles Show positional concepts in pictures and words. Aligns with common early-learning standards. Only matching pieces fit together. Words on puzzle-piece backs as another way to match. Durable, 3" x 3" pieces. Sturdy storage box. Photos for real-life learning. 24 two-piece puzzles. 48 pieces. Ages 3 & up.