re: First timer in Vegas in December with 2 kids 10 and 13

I took my daughter to Vegas a few years ago, she was 11 at the time. The one thing I would have done differently was stay at a non-gaming property.

Things to do:

Meow Wolf recently opened. I haven't been yet, but I've heard really good things about the Santa Fe location.

Neon Museum I saw the Tim Burton exhibit at night, but didn't get to see the rest of the museum. I plan on going back the next time I'm out there.

Sunset ride on the High Roller. If you schedule your ride at sunset, it should be light when you get on and dark when your ride is over. The fountains at Bellagio look cool from the sky at night.

Zip lining down Fremont St. SlotZilla

If you're in the mood for more mountains, the 13 mile scenic loop at Red Rock Canyon is worth a visit.

Places to eat:

Sugar Factory is definitely ridiculously over-priced, but their drinks and shakes are noteworthy.

Cotton Candy Burrito at Creamberry. I recommend calling before you drive out there to confirm their cotton candy machine is working.