Puppy Pool Party 500 pieces Puzzle No Missing pieces Jigsaw Puzzles for the Adults: Our exceptional 500 pc jigsaw collection provides original and intriguing gifts for any interest, age, or ability. The random die-cut puzzle pieces are designed for all Bits and Pieces puzzles. No two pieces are alike. Durable Puzzles: Our jigsaw puzzles for adults are made with recycled cardboard using a thick chipboard backing which makes the puzzle pieces solid, prevents bending while assembling the jigsaw,