Parker almost always finishes eating way before Gavin (Gavin is a notoriously slow eater). So he quietly plays while Gavin finishes up, all the while keeping a watchful eye on his big brother, or rather, on his big brother's plate of food. As soon as Gavin gets up, Parker is like a stealth bullet quickly and quietly making way for Gavin's plate.
Making his move...
Never mind that he has a completely full plate of the exact same food at his spot that he didn't eat.