Sibling rivalry

"You always get the floatie! It's never my turn."

"You didn't even remember we had it. It was my idea to get the floatie. I blew it up and you didn't even help."

"I did so help. You got in the way so I couldn't hold the hose in the right place. You pushed me away."

And earlier:

"Ewwww. I don't like your stupid cornmeal pancakes. I won't eat them!"

"You stink. I'm sitting here in your fart cloud!"

They have a little six-foot wide, 18 inches deep, backyard swimming pool. Learning to negotiate, to compromise, to listen to the other person's point of view: is a lifelong process.