I do answer questions when he asks...which sometimes causes me to have conversations like I did this morning at 7am about prime and composite numbers (before I even drank any coffee). But I don't think it's necessary for me to go above and beyond to teach him more because he already knows sooooo much and he has many more years to learn. kwim?
I do kwym. that is exactly the attitude I took when DS12 was 4. What I feel that I missed was that while it's true that he wasn't in need of learning any particular thing, he was in need of learning how to learn challenging material. OK, at 4 it should only be a teeny challenge, but I want you to have the structure in place so that when he is 7 it can be a bit of a challenge and at 10, a challenge.
I think that with the handwriting, just praiseing the pretty writing when he does it can go a long way. I would encourage having a few 'Handwriting without tears' printing books around the house so that you can say, 'hum, what do 'a, o, d, g and q' all have in common?
(they all start being formed from the letter c)
or, 'hum, are there more letters that start up high, or down at the line?'
(they all start up high)
just to bring some ideas to his awareness.
smiles,
Grinity
