I am unimpressed. Don't get me wrong, it's a neat little hobby project but I don't see how this can be considered something "cool" to have around the house. Heck, a lava lamp itself is more interesting and at least more aesthetically pleasing.
hehe basically the last part of the vid made it interesting? Well, it's ok I guess, maybe if there's a kit and I'll build it its good. But indeed it needs to be bigger so the effects can be seen easily and be appreciated.
It would also be amazing if you have several of these and each can respond to different frequency depending on the music.