"Here... diagonally"

If you were a kid in the 1970s you probably remember the commercial for "Connect Four:"

sister: I win!
brother: where, I don't see it
sister: see, here...diagonally
brother: pretty sneaky, sis!

Then the brother - frustrated - would let all the checkers fall to the table in a red and black crescendo worthy of Stendahl.

Now my son is in a "Connect Four" phase. But at five, the concept of diagonal is on a par with astrophysics. Again and again I get to relive that commercial. Except my son, rather than being impressed by my cleverness, is simply bewildered. He does enjoy watching the checkers crash.