Cinderella, Belle and Ariel star on this cute 3D puzzle that hides a little surprise The hinged lift lifts to reveal a secret storage compartment, ideal for small treasures. Click the 54 high-quality curved plastic pieces into the 2 heart-shaped frames, following the numbers printed on the inside and the instructions provided. Fit the 2 separate halves of the puzzle together and you have a unique 3D heart. This puzzle uses unique plastic pieces, which slot together to build this sturdy and strong model. No glue required Each puzzle piece is printed with a number on the reverse side, so you can either assemble the puzzle by eye, or just by following the numbers.