Late night motivation

On nights like tonight, when I'm 20 hours in to a 24+ hour shift, it's the image of my sweet little boy sitting on the mat at daycare today, banging two blocks together and throwing his head back with peels of laughter with each clang, that gets me through. That and the thought of walking in the back door to the welcoming arms of all my boys, still in their pjs, cooking a grand breakfast feast to the smooth voice of Ella or Louis. If one kid is this much fun, is two simply exponentially better?