You meant it as a joke when you took Chris to the children's playground. He has been very picky with his food the day before, so you took him here as a way to say, "since you're acting like a child, play like a child."

You didn't think he'd actually play.

Now you were sitting back, watching him use the slides, and swing on the swings, then look back to you to laugh how he could touch the trees with his feet. You failed this time, but it was worth it.