How can I manufacture my bedroom look different minus moving anything? wardrobe? I want to make my bedroom look different in need moving anything...

I want to make my bedroom look different in need moving anything big..eg..furniture..etc...and without fine art the walls or putting wallpaper..etc...I want to make my bedroom look more ably groovy or whatever its of late that I find my bedroom looks very boring at the moment...so I want it to change! so what little things or medium-sixed things can I buy to make my room look better and different? some things contained by my room are:

- computer table
- book shelf
- wardrobe
- little book shelf ( 1 metre tall )
- bed
- 2 computer chairs

thats some of the ' big stuff ' contained by my room..and I don't want to buy any furniture to make my room different..and I don't want it to be expensive any..so probaly somewhere around $1 - $10 the maximum I want to spend is $12 ..that is adjectives..

Thankyou for helping..
Answers:    Buy some posters. Get some pictures of your friends doing stupid stuff. Art drawn by you. Maybe a flag... Craigslist.org has some cheap trimmings you can find. Many different styles.
You would be amazed at the changes only by choosing one color for pillow (on bed), curtains, maybe a throw rug. If you can't afford to buy these items, consider stuff to cover an existing pillow, add tiebacks to existing curtains or a trim on a valance. If your bench is a padded form, consider changing out the wad, extremely easy (fabric & staples). Add like peas in a pod color to art work or cover a matting contained by the same color to coordinate beside the room.Stick to one color and everything will gel.