Oh man. Where to begin?
When my older daughter was 18 months, she could speak clearly and in full sentences. We went to the grocery store and there was a man shopping who had an obvious toupee. She pointed at him and said in a loud voice, "Look Mommy! That man has a monkey on his head!" (and then began making monkey noises) I wanted to die!! I grabbed her and ran out of there.
Then there was the time when my younger daughter was 2 years old and had been quiet a little too long. I went to find her and found that she had lined up all my shoes on the floor of the closet, had grabbed the Costco-sized bottle of hair conditioner (with a convenient pump dispenser), and filled ALL of my shoes to the brim.
And the time she got out her green poster paint (which she had to climb the closet shelving to reach), and painted the cat. (The cat is a very laid-back breed or I'm sure my daughter would be minus an arm or two after that experience.)
And then the time when she had been interested in "helping" me do laundry. She saw a dry load of laundry (whites, conveniently) in the dryer, added an entire box of crayons, turned the dryer on, and voila! An hour later when I went to get the laundry out of the dryer, I found both the laundry and the dryer drum to have been redecorated. Nothing like spending a whole Saturday scraping crayon off the dryer drum with a butter knife.