I could write a book on this stuff but a couple that come to mind are:
When our youngest was 2 or 3 we were walking along our country road and the cows were cooling off in a small pond. she looked at them and started jumping up and down and said look mommy the cows are taking a bath.
The other one was in walmart and my then around thre year old GD saw a woman with some very weird looking hair. She very lodly said Look grandma. I told her quietly that she should not talk about how other people looked because that might hurt their feelings. She agreed then, after her mother came up to us and we rounded the corner my GD said look mommy there is that woman with the ugly hair that I cannot talk about. lol Kids are wonderful