Think outside the icebox. Then turn it upside down over your head.

It's so hot right now.
someone observed.

Well,
our son said.
That's okay, because do you know what I'm going to invent?

What are you going to invent?
I said.

I'm going to invent a machine that takes ice cubes, and turns them into cold water, so that people can be not as hot.

That's already easy to do!
our daughter exclaimed.

Oh.
he said.
Well then...I'll invent a bucket that I can put a bunch of ice cubes in, then I'll dump it over my head and it will make me cold.

That's not a bad idea.
I said.

So invent it.

What I didn’t add was that of course I would be the patent holder, and therefore subject to regulating and dispersing all royalties related to its ongoing success.

He ran off to play. I have to get him. It’s work time, not play time. We got cash cows to milk.