I could have written your post!! You are NOT alone. smile

hmmm,... how to explain my LO's behavior at the library. He walked early, so by 10 mos he was under the tables trying to unscrew the bolts out of the legs while listening to the story and shouting out "MOOO", when the librarian asked what the cow said. He NEVER was still/would sit more than 30 seconds, yet listened and enjoyed books. He would sit with ME at home for 20 mins at that age and be read to while he sat in my lap (about the only way he sat! )

Fast forward to 2 yo, he wanted to play/interact with the kids, and dearly wanted to BE the librarian- he would pull up a chair and sit next to her with a book on HIS lap. sigh.
We have a very patient and giftedness-aware librarian.
But UGH the LOOKS I got from the other kids' parents made me want to slink under the carpet somedays.

Fast forward again to 3 yo- we have tried off and on the whole library thing, but the last time we went he sat nicely for 5 mins, then stood up in the middle of the group and said, "Oh, uh, there seems to be some mistake here, excuse me", and he left to come type on the computers with me.... smile

?? how much is ADHD, how much is overstimulation for an extraverted only child to sit still in a group of kids, how much is psychomotor overexcitablity, how much is just that the reading was below his level and he didn't consider himself a peer of the kids who were listening?? I don't know.
I'm here with you, though!