-some christmas tree branches
-zip ties or wire or something similar
-vase (size depends on size of tree you want to build)
-damaged christmas tree (OPTIONAL)
I found my FREE christmas tree branches on the place where they are selling christmas trees. I asked them if I could get branches they cut off the trees and throw away. I asume one could get whole damaged christmas tree that way (or at least buy for very cheap).
2. Stick smaller branches betwen biger branches that you have tied together before.