Crazy, just crazy

My grandsons arrived today for a visit. Here, they are beguiling me and everyone else in the vicinity by striking poses while their father wrestled with the car-hire people. I don't know where they learn the unerring ability to strike a pose, but strike they do. Throughout the whole tedious business they maintained a joyous - if slightly anarchic - good humour and now, mercifully, they are sound asleep.