Here is a tutorial for the cute Truffula Trees (from The Lorax) that I made for the room. These could also be made as the pink clover from the Horton Hears a Who book. These are very simple to make and only take a few minutes.
styrofoam balls of various sizes
floral wire or wooden dowel for the stem
Take one end of your feather boa and begin securing it to the styrofoam ball with pins. You will want to use a couple extra pins at the begining of the piece of boa, and also at the end to hold it securely. I thought about using glue for this but decided that it might permanently muck up the feathers. Using pins allows the feather to stay light and fluffy.