Modified tree branches make easy and inexpensive D.I.Y. decorations; above is some inspiration to get you started. The white branch bookcase appears to be a prototype or an art installation, and I’m not sure if it’s a real branch or how it attaches to the wall. The other two are fairly straightforward mods.
*A nice book. The design aspect isn’t that impressive, but it’s not meant to be. What makes this book interesting are the ingenious, economical solutions of real people.