Brain Games Enjoy our huge selection of fun and popular brain training games.
Physics Games Physics-based games for you to play online.
Magic Triangle Game Fun online math game.
Optical Illusions are Everywhere Wonder how optical illusions work? Find out here.
Word Games Find the hidden word within each circle; only one correct answer per circle.
Professor Tangent True nutrition for the mind. Quality thinking: skeptical inquiry, logic, brain teasers and other brain food.
Café Wall Illusion First discovered in 1973, this tile wall appears to move.
Hexaflexagons Online tool kit for building a hexaflexagon, which is a six-sided folding puzzle toy.
Logic Mazes Challenge your brain with tilt mazes, eyeball mazes, sliding door mazes and many others.
BrainVista Solve these brain teasers through application of logic and math principles, but be warned; some of these games have no solution.
Eluzions Distorted illusions, ambiguous optical illusions, moire patterns, pen and paper games, and online board games.
Archimedes Laboratory Find illusions and paradoxes, oddities and curiosities to test your brain.
Perplexus.info Perplexing puzzles, from simple logic puzzles and word tricks to complex games involving geometry and probability.
BrainBashers The cryptogram puzzles on this website are challenging; see paradox puzzles that appear to contradict reality.