Excerpt from when Isaac was 3 and Charlotte was 1 1/2:
6.20.07 Today Isaac brought his toy jeep over to me and said “mom, want some noise†then he turned it on.
6.21.07 Today I took Isaac to the post office with me to buy stamps. 
I let him put the money in, make the selection and then collect the change at the end. As we drove away he told me “mommy buy money at the Post Office.†I guess he thought that when the change came out it was what I had purchased.
I brought a chair into the bathroom for our nightly teeth brushing ritual. Isaac and Charlotte each climbed up and as Isaac looked in the mirror he excitedly proclaimed “big and little†in reference to the height difference between him and Charlotte.
Isaac got a birthday card from Great-Grandma Cochran a few days ago. After he opened it we read it and he looked at it. Then he opened some junk mail and said “yay, another birthday card from Isaac.†For the rest of the day any piece of mail or paper was another birthday card for Isaac!