We've always taken the DC out on Christmas Eve since they were tiny.
When my DS was 1yo, (if my parents were visiting, they took him while I was cooking) he went to the park to play on the swings.
When DD came along we went to feed the geese and have a walk round the lake.
Then when they were older we fed the reindeer and walked round a huge park.
Last year we went to the cinema (not shopping, shops were too busy for that malarky)
Breakfast croissants and jam, orange juice, coffee, scrambled egg and toast.
Lunch is fish fingers, veg grills , chips, salad, trifle/ice-cream
Christmas Eve Hampers
TV or a Christmas film at home
DC have their bath and PJs.
Late buffet- French bread, crisps, cheese, cake
Then when the DC are in bed, a scary film.