Not to worry, intrepid grown-up! Peekaboo is a game you play with babies and toddlers. First, you hide your face – usually behind your hands or a napkin or any other random object you might happen to be holding. Then, you suddenly reappear and say 'Peekaboo!' (in a nice, friendly way – not a scary, shouty way, mind). This causes giggle galore! And then you repeat... and repeat... and repeat. The benefits of peekaboo for babies include teaching them coordination, problem-solving skills, mental stimulation, and – most importantly – having fun!