Good advice from the Bush-twins to the Obama daughters:

Last night we had a 2-hour break between quiz matches. We found a janitor’s cart and the brain-juices started to flow.

This is what we came up with:

Something we probably take for granted each time we watch a football game: the digital, yellow first-down marking line. I always thought it was “magic” that made it appear there on the field for our viewing pleasure. Turns out it’s a lot more work: