We'll just give you some tempting ideas.... in case you're not dedicated to a tree yet!
* Feeling crafty? check out this gorgeous origami Christmas tree.
*Use a (fallen) branch (with leaves attached or stripped bare)
Fill vase or bottles with sand (or stones) and stick branches into it/them
Paint the branches or leave natural or even wrap each branch with wool, cotton or fabric.
Decorate with anything you like! (keep the hanging decos light in weight)
**** We did this one when our first child was almost one. We kept it off the ground, on a table, and her eyes would fill with delight when looking at the different balls, stars and fairies hanging from it. Pure and simple!
* For the minimalist: stick on wall decos.... (if you're short on space or have small kids that may tear the tree apart!) I love the tree above.... maybe next year.
Finally, what we did last year:
* Stick removable hanging hooks (M3) on the wall in the shape of a tree (triangle) and hang your decos from the hooks!
Or in rows or a line around the room.... use your imagination.