Make Up The Wall
This is THE coolest thing I have seen online for wall decor. Just paint your wall the colour you want and then draw around the stencils. Colour them in with markers, coloured pencils or crayons, you could even paint them in. Tell me this isn't the coolest, most fun thing you could do to your walls. 
make up the wall
http://www.makeupthewall.com/
Make Up The Wall
This is THE coolest thing I have seen online for wall decor. Just paint your wall the colour you want and then draw around the stencils. Colour them in with markers, coloured pencils or crayons, you could even paint them in. Tell me this isn't the coolest, most fun thing you could do to your walls.
make up the wall
http://www.makeupthewall.com/
COOL MODERN HOME