Me: "because we need it to stay alive. Did you know our body is partly made of water? Crazy, huh?"
My son: "what? Where does it go?"
Me: "the water? To our whole body. Some of it can be things like your spit or tears even."
My son: "I am going to catch people's tears in the tiniest bag and then show them to people and say 'these are your tears I have'."
My son: "Dad, how was I able to grow big from a tiny baby?"
Me: "you are growing now, and will keep growing until you are about 18 or so. You know how baby kitties grow into big cats? It's like that, but slower for us."
My son: "wait. Are old mans real then?"
Me: "yeah, you've seen them when we go out."
My son: "oh yeah. So are you going to be an old man?"
Me: "some day."
My son: "I will buy you a nice cane when you are, Dad."