I made several of these a few years ago. I adapted a pattern from Steve Good. His had an open back, I wanted to close it in. I use 0.36 watt LED to keep it cool. They come in red, yellow, blue, green and orange. I just use printer paper to diffuse the light. It's 6" x 6" x 2-3/4". I think I'll give it to my granddaughter.