Don't Cry Over Spilled Milk

I'm in the kitchen cooking (something I rarely have the time/energy to do anymore) and I hear this gurggling and splashing sound from down the hallway. I peak my head over the counter to see what's going on and I find this:

Jacob has his sippy cup of milk and he's having the most wonderful time filling up his mouth with milk and then letting it run/drip out of his mouth, down his shirt and onto the floor. So what's a Mom to do? My first reaction, not to yell, or even to clean up the mess, but: Hurry, get your camera before the moment's over! Here are the photos: