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Once relegated to science fiction movies, plasma balls are now for the home or office, and they are quite affordable too. They are one of those cool things that not only look nice, but they provide a tactile experience as well. It certainly attracts attention, and people just have to touch it, because the light reacts to touch. A great great gadget for any computer desk.
USB Plasma Ball lamp:
USB Plasma Ball lamp pictured: NEEWER® USB Powered Plasma Ball