Decorative art that you make yourself can add decorations to any room!! If you frame the artwork it looks more classy, but keeping it on canvas works great, too. If you're like me and don't use canvas much then paper artwork is great, too. Just hang it.
Hang jewlery on "fancy" hangers if you wish or simply try this idea: Hang Jewlery onto your wall by using a bulletin board "tack", putting it in the wall with parent's permission, and hanging necklaces on that. It's decorative and practical.Create a simple "box" displayer with 4 pieces of sanded wood in the same size. Painting the wood is optional but very pretty. Once dry, nail together the painted to wood to make a square "frame" box-like shape. Nail to wall to display stuff.
Create a recycled frame for a mirror or artwork by rolling up magazine pages into small "scrolls", then glueing onto a wood frame. Cover the frame to make the border, then place it in your room.
Enjoy decorating your room!