Thanks everyone for your posts and photos. I think we are going to go with either the Gray Wisp - I like the fact that it is a very light blue or Glass Slipper from ICI ( a friend used this in their house). Thanks again!

it may just be me, but I wasn't able to open the picture.

White could work, but maybe you could find something that incorporated that chartreuse color. Do you have any ideas or themes you’re looking towards? I was thinking about that geometrical bedding. It reminds me of a rubix cube or tangram. Maybe you could use something along those lines to decorate the walls. Off the top of my head I’m thinking either framing or gluing some tangrams together to hang. Maybe a poster print from a rubix contest. I’ve also seen framing game boards or the box covers. That could expand your color options too. Tangrams

Look for a great fabric for children for curtains and decorative pillows or to cover the rocking chair cushions and then choose a color from the fabric for the walls. Reconsider the barn siding wall; the room is small and you really don't need an "accent" wall.