Our 10 year old daughter discovered these 3D puzzles this past fall by accident. She found one at a yard sale. They soon became her reward for good behavior with school because she loves them so much. See, we homeschool for many reasons, but the biggest is because she is dyslexic. She is amazing with these puzzles. She takes them apart and puts them back together every day. It amazes me because they are not easy, but she puts them together like they’re nothing. The company is fabulous as well. She accidentally broke a piece to one puzzle, so I emailed the company with the puzzle and piece she broke and they mailed a replacement piece within 2 weeks. No questions asked. Love, love, love these puzzles!