Play a video game

Companies like Lumosity charge you a monthly fee for brain-training games, but playing puzzle games on your kid’s Xbox may have the same effects—and depending on what you play, may be even more effective. In a Florida State University study, subjects either played games on or played Portal 2, a popular action-puzzle game for computers, Playstation, and Xbox. Those who played Portal 2 scored better on problem solving, spatial skill, and persistence tests. Other research shows that playing Tetris may increase gray matter in the brain.