They're on to me.

As I was getting the kids their lunch ready today, I asked them what they wanted to drink: water, juice or milk?

Here's a little background, first - I always water their juice down. I figure that it is healthy in reasonable amounts, but they don't need the extra sugar or, in Izzy's case, the extra calories, so Izzy's juice is always 2/3 water, Sophie's half.

Okay, back to the story...I offer them water, juice, or milk and they both cheerfully reply:

"Water-juice!"