Claude and Sir Bobblysock just happen to wander accidentally into the royal palace on a very special day indeed – the Queen’s birthday! Unfortunately the royal nanny, Nanny Stern-Bloomers, has had to take herself off for a lie-down and there’s no one to make sure the royal children stay neat and tidy for the big party. But . . . Claude and Sir Bobblysock could step in to babysit, couldn’t they? After all, princes and princesses are always on their best behaviour . . .