1) My son was speaking in full sentences when he was 12 months. We were in for a well-baby check up, and the dopey public health nurse came over and said, in baby talk, "Have you started SPEAKING yet, can you say MOMMY??" My son pulled his pacifier out of his mouth, gave her a big smile, pointed to his Max Mekker doll lying on the sofa, and said "Max Mekker is over there."
2) He spoke both English and Norwegian more or less from the get go, but he superimposed them on each other, mixing vocabulary and putting one set of grammar rules on the other. Verbs in Norwegian only have one conjugation in each tense, so he'd say I is, you is, they is etc., just as he would have in Norwegian. I explained that in English it was I am, you are etc, and he looked at me patiently, sighed, and said, "I KNOWS it Mamma, but I wants to say I is."
3) Like me, he has always been a great fan of the Wizard of Oz. One day when he was two, I was supervising him while he was in the shower, and he turned to me with a mischievious look, grabbed his throat dramtically, and said, "I's MELTING, I's MELTING!!"
4) At his 4 year check up, the nurse showed him one of those pop-up toys, with five animals you can push down into boxes or push a button to have pop up. She asked him how many animals there were, and he said five. Then she pushed three of them down into their boxes and asked how many there were now. He looked at her suspiciously, and said, "There are still five, but you hid three of them."
5) One morning when he was 3, his father and I were teasing him a bit - just good natured teasing. We were visiting my folks in the States, and trying to take advantage of speaking as much English with him as possible. He got irritated at the teasing, and tried to find the nastiest word he could think of, and said, "Well, well,...you's....FAMILIAR!!!!"
Poor guy we dissolved in laughter, couldn't help ourselves. Apparently familiar sounded really nasty to him.
This one is about someone else - can't remember if a friend told me, or if I read it. It concerns a little boy who, after making some comment out loud referring to someone else's physical handicap, was told by his embarrassed mother shortly afterwards that staring or commenting out loud on peoples' appearances or handicaps etc wasn't polite, but that if he ever saw anything he wondered about, they could of course talk about it later, at home. So of course they eventually sight another person out in public with a physical handicap, and the little boy points and says loudly, "Boy, Mama, we're gonna have to talk about HER when we get home!"