I took Jacob and Joey to Children's Discovery Museum today. On the way there, I told Jacob, Jacob, you are a big boy now, you need to help mom keep an eye on Joey.

Jacob: Okay mom, I can watch Joey because I have good eye sight. I can see so far, even the mountain that's far away.

Mom: Yes, Jacob, you have good eyesight.

Jacob: You can't see so well anymore because you are old.