Not sure how much room she has, but I love to re-do vintage frames and put pegboard in them. You can paint the frames any color. I'll attach a pic of mine. The photographer got a most of the booth, but you get the idea.
Also, since it's a dance studio, Jewelbox's idea might work great. I've done these before as well. Here's a link to a cute one on Etsy: http://www.etsy.com/listing/79227157...facet=handmade