It's amazing how quickly fun and fussing can morph into the other. For example, you're having a great time smacking each other with the giant ball when all of a sudden your playmate stops playing that game without informing you. There is crying and yelling as, suddenly, the same thing that was fun a minute ago now hurts. Someone is in trouble and it's usually the one with the "weapon." Thanks a lot, punk.
Thankfully, this time the direction went from fussing to fun, from yelling to laughter, from (fake) tears to smiles, from hitting to playing. Fun is so much better! I'm a big fan of fun.