These kitties must be looking at a laser or something, because their ability to bob their heads in sync is uncanny! I have two favorites, though. The kitten lying down who can't be bothered to even sit up (but whose head is bobbing, nevertheless), and the kitten in the front who puts its little paw/arm around the other kitty's shoulder. (Swoon!) As geeksugar remarked, "This video was made for rewatching!"
Thanks, Cute Overload!