Does anyone know if they do birthday parties for kids. My daughters 6th birthday is coming up and think this would be a great family trip

They do

They probally do, call and ask

Why don't you simply call Santa's Village and ask them? I'm sure they will give you all the specifics.

They definitely have party packages. https://www.santasvillage.com/park-info-tickets/birthday-group-reservations/ Currently they are $90 for up to 8 guests plus the cost of admission. Additional guests are $10 each.