I've volunteered to bring some crafty things to keep them entertained, so have been racking my brains to come up with non-messy projects that don't involve glue or paint. Here they are:
Glittery pine cones - we collected loads a couple of weeks ago and put them in the airing cupboard to dry/open out. I've bought a big bag of tinsel pipe cleaners (who knew these even existed? My life has been transformed), which can be wound round to make tree decorations. Easy.
Pomanders - one for the older kids I think - when I made mine I found the cloves quite hard to push in.
2D beady baubles - I've cut out a load of circles from silver card, punched holes in them, and threaded them with silver elastic. The kids can go wild decorating them with self-adhesive jewel beads and various other stickers that I've dug out.
3D Christmas trees - I've adapted this from various versions I found online. You cut out two identical Christmas tree shapes from green card and then cut slits in the middle (from bottom to middle on one and from top to middle on the other). Then you put stickers all over both sides - I've gone for a dotty/bauble theme here - and slot them together.
I'm also bringing a pack of paper chains, and a load of black card with metallic crayons (I don't know why that feels Christmassy. It just does).
Wish me luck...