Design Dreaming: Playroom

Alright, ever since our bathroom remodel and walling up what used to be the old playroom closet I've been wanting to get the playroom painted.  There's still a patch where we added the new portion of the wall, and it really does actually NEED paint on it.  I've been brainstorming and browsing design ideas.  Wanting to keep the layout mostly the same since it works well for us, I'm mostly needing to add in color, in hopes of adding fun flare to the room and bring it to life!  

We currently have red, lime green, and navy blue storage bins on our white shelves.  So here are some of my inspiration pictures that would coordinate well...

I don't know if this is actually the SAME room and thus the same wall color but at a different angle aka different lighting, but I like the slightly lighter color green better.

We already have a wall of frames for kids art (might paint them white??), and I really do want to find a really large world map for our other full wall, so I want to keep the walls solid color.  Thinking of letting the kids add hand prints to their art wall.

Now for curtains.  We have one BIG window and one small window.  Here are some of the ideas I've been looking at...

If the curtains are mostly open, the print would be smashed and the stripes would look better than the polka dot. Or you could go with just a valance and mini blinds.

OR I could get one of the large striped curtain and SEW it into 2 valances.  Although eventually I'd like BOTH--striped curtains AND a solid color valance. Oh dear, now I'm thinking of all kinds of options...