Interchangeable Face Light Box

This is an idea that came to me while I was cruising MakerWorld. I kept seeing the different light boxes, and granted this one doesn't have the profile like some of the others that I've seen. But I thought, why not have an interchangeable cover? This way I can print the base once and interchange the actual lighted portion to my liking/mood. The NXN logo is one that I created for my son, Nixin, who has Down Syndrome (the characters hair are his actual 3 21st chromosomes from his karotype