At this age, a simple game of peekaboo will absolutely fascinate your baby. He''s starting to understand object permanence (things don''t go away forever when they leave his sight), and he loves games where people or things appear and disappear. In fact, one of the easiest ways to keep a 7-month-old occupied is by hiding an object under a blanket for him to discover. If you get tired of peekaboo, try rotating in other classics such as patty-cake.