Inside a laser star effect projector and mods.
TIP: Right-click and select "Save link as.." to download video
Initializing link download.....
I'd also noticed that versions are being done for outdoor garden use, and I must admit that when fired up into a tree it's an impressive effect. Like a 3D sea of fairy lights in the tree.
Of course, whether you should be firing lasers at planes and wildlife is debatable, but the divergence and splitting of the laser beam is probably enough to limit the risk of any issues.
The ebay listing I bought this from was a UK warehouse.