End of the high chair?

Recently Zack has been asserting himself as a big boy in certain ways. Most recently he has demanded to sit in the booster seat, or big boy seat, at the table instead of the high chair. that way we all eat together at the same table. he's been sitting on the potty more frequently but no other progress there yet.

Zack is getting into counting now. We count trucks on the highway as we drive. Unprompetd, here is how he currently counts to ten:
"One, two, three, four, six, five, ten!"
I'm sure this will change by the end of the week because we are counting so much.

He got his flu shot last week, and cried after he felt the needle, but stopped abruptly when he got a band-aid on the arm, saying "sticker!". I guess stickers do the trick!