I need ideas for what to do with/for my grand children this Christmas.

Like most people, Christmas is going to be pretty lean this year. My 5 grand kids range in age from infant to 4. In the past I have taken what I now consider the lazy route at Christmastime and bought extravagant gifts.
This year, times are leaner. I want to help make Christmas special for them, but I can’t spend hundreds of dollars.
I also don’t want to center everything around food. I lost a lot of weight and I am struggling to keep it from all creeping back on. Cookie dough is my enemy.
I live in Central California, so we can’t go out and make snow angles or anything like that.
I could also use some help with ideas for their parents as well. I am pretty good about babysitting when they want to go out together already. I need something more creative than that.
I am not real crafty, although I am creative. My husband is a contractor and is great at making things, but he is not inspired or motivated about it like I am.
I’m looking for brainstorming here. Any ideas?