Optical illusions are not just fun games, they are great tools for brain exercise. These mind-bending illusions challenge ...

We often engage in exercising our bodies. But do you know the importance of exercising your brain? Brainteasers, puzzles, and ...

For instance, see who can figure out what’s going on in the optical illusion above. Then get more puzzles and brain play with these printable activities from the Nat Geo Kids book Brain Games.