These are so simple anyone can do them. Plus, the best part is, they don't all require a glue gun! Even though I have gotten much more comfortable with them I still cringe at having to get them out and I love just throwing stuff together with what I already have. This bottom tree is cute enough to maybe be worth the try though. Although the tree made of boxes at the top is my fave!
Check out http://www.bhg.com/ for more ideas!