WATCH: Giggling ‘Peekaboo’ twins have each other in stitches

One of these twins learned a brand new game while his sister was fast asleep. Now that she's woken up, he can't wait to show her how Peekaboo works! Watch as the nine-month-old brother and sister descend into giggles in the game that never gets old! https://www.youtube.com/watch?v=PEQNzcnz0rU