Leash- I teach my class that one too!! I say that the thumb is the steering wheel and index is mum and dad driving, the 3 kids are in the back but the middle one is Jess (my DD) and she is learning to drive so she watches closely but sometimes she is naughty and tries to get into the driver's seat LOL The kids love it, you hear them saying "oh no Jess is trying to drive again!!"