I took Anna to a new park yesterday. It was a big park with lots of room to run and play, but the playground was a bit disappointing: small, with only a couple of slides and next to no shade. Instead of the usual wood chips, the area around the play structure was filled with sand. Granted, sand is soft, but it also gets hot in direct sunlight.

As we walked up to the play area, Anna sat down to take off her sandals.

"The sand might get hot," I said. "You'd better leave those on."

"I don't want sand in my shoes."

"Ok, but your feet might get hot."

She pulled off her sandals and stepped into the sand.

"They're not hot."

"OK." I picked up her sandals. "I'll hold these in case you need them."

She played for about two minutes, then suddenly she started crying and ran over to me.

"You were right daddy. My feet are hot."

I picked her up and brushed off her feet. They were just a little bit red—not too bad. I helped her put her sandals back on.

"Do you want to go play some more?"

"No, I want to go home."

I felt awful. Her playtime was ruined. Later that day, though, it dawned on me: That was the first time I ever heard Anna say "You were right, Daddy."

Anna's at that age where she disagrees with everything I say. For example, many times when we come home from playing, Anna will dawdle a bit at the bottom of the stairs. "Anna," I'll say. "We need to go upstairs."

"No, we need to go downstairs."

"Anna our apartment is upstairs. We need to go up." You'd think by now I'd know not to try logic with a four year old.

"Our apartment is downstairs."

"No, Grandma's apartment is downstairs. We need to go upstairs." At this point, I think I've bested her, but no . . .

"I want to go to Grandma's." Game, set, and match to Anna.

It's only going to get worse. Soon enough she'll be a teenager, and she'll never agree with me. So I need to savor these words while I can:

"You were right, Daddy."