Invented in China, the puzzles known as tangrams remain a timeless activity proven to develop logical thinking and math skills—which is why tangram games, which involve piecing together colorful shapes to recreate a pattern, are excellent for kids. Tangram sets can help young ones with color and shape recognition, spatial understanding, and more—but because tasks typically involve assembling cute designs like bugs and robots, the activity can feel very much like playtime. In our book, a good tangram set should be built to last, with smooth and vibrantly colored shapes and plenty of puzzles to keep kids engaged and challenged. Browse our favorite sets below.