Project: Kids' Room

The kids room is being redone in "Rainbow Learning", ABCs, 123s, and shapes, all in rainbow colors. So far I've finished making and hanging the cardstock border, it's hard to see in the pics but the alphabet, and 0-9 are written on the cards. I'm still working on ideas for their new curtains, and other decorative accents, I'll post more once I get it all figured out. Any suggestions? (Keeping in mine that we are on a budget, and can't paint the walls.)