Ok, a little early to prepare for Christmas, but a few weeks ago I picked acorns and put them to dry. This weekend the kids and I had a little Christmas decoration workshop with the dried acorns. With glue and glitter we made the vainest acorns for Christmas.
If you want to make your own, I have a tip: Spray the glittery acorns with hairspray after the glue has dried, to fixate the glitter.
Thanks for the great idea, Sweet Paul!