We live in TX, so our Fall/Winter is VERY mild (like, we can still wear t-shirts and shorts through some winters). That being said, we're visiting my brother and SIL in Boston for Thanksgiving (5 days) this year.

What essential clothing items will I need to pack my for my (18 month) LO? (I'm doing this ahead of time in case I can spot a sale)

I figure she'll need a heavy coat, and sweaters. What else will keep her comfortable? Thick socks? Gloves?