This chart is designed to support parents in the process of explaining to their children why sometimes they prefer to watch Top Gear instead of The Wiggles.
Why Greg matches with the Stig? Because he is the one “doing the driving” (Toot toot, chugga chugga).
PS: I have used Greg as the yellow wiggle because here in Italy we are still watching old episodes, and Sam has not yet replaced Greg in the quartet.