We have been scaling back for the past few years anyway, but this year we are buying second hand (Playmobil, lego etc) where possible.
No plastic chocolate filled advent calendar (I make one, and each day has a different Advent activity - such as 'make Christmas decorations' or 'make and deliver cookies to friends').
We also do a 'reverse' advent calendar where every day we put one item into a box that we take to the foodbank.
No Christmas wrapping paper (as it can't be recycled) so we we'll be using the usual recycled Kraft paper (can be bought in the Post office) which the kids love decorating, and we'll only be sending a few handmade cards,
We buy small tins and make things like lipbalm and body butter out of shea butter/cocoa butter etc and wrap them nicely for gifts.
I will make some gifts for the children - some clothes for their dolls, a little sewing kit etc
Buy things like art materials for stocking fillers - so stuff that the kids will actually use, rather than being something just for the sake of buying something!
My daughter has recently had a birthday and she was thrilled with a sponsorship of her favourite animal through the WWF, so we are going to do one gift like this every year. Also asking family to buy 'experiences' - e.g. tickets to our local trampoline park which the kids will love.
Not buying from bloody Amazon - which is going to be tough as it is so easy to just fall back into relying on it. So buying less, buy second hand, buy locally and ethically, and not buying plastic crap or fast fashion.