I have odd kids

This evening as I was putting the boys to bed, Riley started singing this song:
"Happy Birthday to Daddy. No biting. Happy Birthday to Daddy. No biting. Happy Birthday blah blah me, Happy birthday and no biting."

Dylan was blowing bubbles in his water with a straw. When I asked him to stop he said, "If I keep doing it, the water will turn into chocolate milk." Huh?