Puzzles can be categorized by theme, including animals, vehicles, landscapes or cities, world-famous paintings, constellations, and numbers/letters.
By format, they can be divided into 2D flat puzzles, 3D stereoscopic puzzles, tangrams, irregularly shaped puzzles, rotating puzzles, hexagonal puzzles, push-plate puzzles, and liquid sorting puzzles.
By medium, they can be divided into physical puzzle toys and video games.
The video game industry has seen a surge of unique and engaging puzzle games, such as "I Love Puzzle Models" (featuring 3D building assembly), "Amazing Puzzle World" (for children), "Sorting Pets Puzzle" and "Matchstick Puzzle Puzzle" (testing logical thinking), as well as "Magic Puzzle," "Hexagonal Puzzle," "Rotating Puzzle," "Daily Puzzle," "Boonie Bears Puzzle," "Sliding Puzzle," and "Little Mouse Dodo Animal Puzzle," among others.
In addition, there are a large number of early education electronic puzzle apps designed specifically for children, such as the "Intelligence Puzzle - Early Education for Children -" iPad app with 45 built-in pictures and three levels of difficulty; "Early Childhood Intelligence Puzzle 14.0" which provides 167 pictures with text and audio explanations and can be used to learn words by looking at pictures; and the "Kids' Intelligence Puzzle" Android app which includes puzzle types such as animal encyclopedia and English words, and allows users to customize wallpapers and background music.
