The style of jigsaw puzzles is a personal preference, and if you want to get the best experience with your puzzle, picking a style might depend on your purchase. In terms of kids' puzzles, whitemountainpuzzles.com recommend one-piece or mazes. If you're planning on buying a puzzle for an adult who doesn't have lots of time to work on a jigsaw puzzle, then choose from whitemountainpuzzles.com non-tangle puzzles.