why not, we put so much pressure on ourselves to cook a massive dinner no one eats.
I would do beans on toast (or i would if me and dd liked them)as you say dc are i and 3 they won't know any different.
DH likes them with grated cheese.
Do it and have a stress free day with your children thats what christmas is for.
The only con i can think of they can make you a bit windy, mind you so brussels so not much of a con.
For the record i don't like turkey either, and my dm is doing dinner this year, a nice piece of roast pork.