A friend and I got together yesterday and made pelmet boxes for the windows in her nursery. This is a very simple project that anyone can do. You don't need wood, you don't even need a staple gun. Just got glue and an exacto knife (in fact we just used scissors but an exacto knife would make things easier). Get the how to below!
Scotch tape and Duct Tape
Foam Board the length of your window
Flat curtain rod.
Step 1: If you want a decorative bottom then you must first make a template. It's pretty easy. You don't need anything other than paper, pencil, scotch tape and a ruler. Just tape together a few pieces of paper the width of your window.
Step 2: Measure your window then cut your paper to the width of your window.