Yes! I am searching for the same ad!
A boy is reading in his bed. Then his mother opens the door and tells him to go to sleep. The boy closes his book and puts it on a LEGO platform at the side of his bed. The contraption then starts moving (ingeniously) until it finally flips the lightswitch on the other side of the room.
Very cool!
I hope someone finds it!
Cheers,
TofoeBob