I think I'm getting pretty hooked on the design idea lower in the comments of doing it deep blue with stars and moons, using some star and moon sheets Brendan had, and generally doing a stars and rockets design decor for his room.

But I'd love to take you up on help making curtains - possibly I'll find some calico with star patterns on it, once it's built.

And I DO like the idea of the chalkboard! Thanks. I'll talk to them about that when I go get paint.