Review on Ravensburger Jigsaw Puzzle for Adults - 300 Piece by Derrick Lowell

This is a great 3D puzzle and I was looking forward to putting it together with my 8 year old son. Figuring out which piece goes where is quite difficult, but it's useless because the pieces don't stay connected. As this is a 3D puzzle, you don't have the option to place the pieces on a flat surface, so it's very important to keep the pieces connected as you work. Have we tried using tape on the back to hold the pieces together as we go? But that didn't help much either. We stopped it halfway because everything that fell apart took the fun out of solving a real puzzle.