NWR: Bringing FH to NY...need some help!

FH and I will be in NY with my family this year for Christmas...for 12 days!!

This is his first year not being in FL for Christmas so I wanna keep him busy! He HATES the cold and only wants to do things that involve being indoors (or anywhere that has heat lol).

Anyone have any ideas for what we can do during our 12 days in NY? (he's been to LI a bunch of times but we never really 'do things', just hang with the family)

TIA ladies