Welcome....goodness he sounds very similar to my dd 2.9. She is doing 48 piece puzzles, sight word readers, and is soundig out words and very into spelling. Doing simple addition and subtraction, etc. She also gets very frusterated with same age peers as they do not talk wel enough or understand her complex and adult like speech and vocabulary. She loves loves to learn and is highly fasinated by space.
DD would be 5 and 1/2 before she could enter K, but has already mastered all K skills, infact I got a 1st grade readiness test my mom school uses on end of K year and she aced it. So as of now she is academically ready for 1st grade! I have no clue what we will do. I think most likely we will have to homeschool. I do no really teach dd, but she does ask and ask and ask questions so even though I don't plan it I guess I do by answering her...she is very pushy when she wants to learn or understand things LOL.
DD LOVES workbooks, I mean will beg and cry for them and choose them over lots of other play so we have ton of those and she loves to do them. Also she is very into mazes, my tip if your child is is to laminate them, you can use a dry erase marker on them and whipe them off....has saved me a ton of money as she can blow through them LOL. Anyway, again welcome!