All of the pieces fit together perfectly to form a strong and sturdy spherical puzzle. Comes with a plastic stand so you can place your completed 3D puzzle on display in your room for everyone to admire! Our 72 piece 3D puzzle ball jigsaws are crafted with premium quality and when completed are 13cm in diameter. Great 3D puzzles for Children 6 years old and up. Fully complies with all necessary UK and EU testing standards. This puzzle uses unique plastic pieces, which slot together to build a sturdy and strong model. No glue required! Either assemble by eye or using the numbers on the reverse side.