One day when it was raining and we were going stircrazy in the house with no car to go somewhere more fun, I took you out on the porch and held your hand out to feel the cold raindrops.

"It's raining," I said, and you repeated, "naynay."

Since then, you've expanded the word from the water drops that fell from the sky that day to puddles, both indoors and out, condensation on windows, dew on flowers, and even teardrops rolling down my cheeks once.