The Crystal Caves. We’re using ideas from game design, optical illusions, and magic to make this the most interesting and engaging puzzle you've ever solved. Magic Puzzles are printed on premium Dutch puzzle cardboard so they snap together and stay put. Each puzzle comes with two large posters of the artwork so multiple people can all work together. And when you’re done, everything can be packed back into resealable bags so you can gift it forward. Magic Puzzles have NO puzzle dust in the box and have NO single-use or disposable plastic.