Tell us about yourself!
Cool idea! I caution that if you have multiple cats that only semi get along, with only one entrance/exit, that thing is a cat thunder dome :)
Concrete LED Light Cube
Casting In Pre-made Molds
It is made of minerals, go figure.
Advanced Plasma Arc Speaker
Yes, I dislike seeing these speaker projects with no consideration for actual speaker building portion, which is the most important and interesting part. A car speaker probably won't have the parameters available to even create the correct enclosure, but are probably more forgiving in that regard. I guess I will have to create my own Instructable.
SmartPhone Controlled RGB MOOD Light