Collapsible Xmas tree
See it unfold...
(click on picture to see video)
...and fold back down :)
(click on picture to see video)
You can use any edging for this piece. Make as many concentric circles as you want. Not too tight otherwise it will be difficult to fold it down. Then join the circles with bare thread, and make the spaces between circles at least the same height of the edging, otherwise it won't fold completely down.
Merry Christmas and Happy New Year 2023!