Fully custom puzzle box built in Washington State, USA. Test your logic and mathematical skills trying to help Thomas Edison convert AC into DC so his historic invention, the incandescent light bulb can illuminate your imagination! This puzzle will teach you genuine principals of AC-DC conversion which are common place in modern households (wall chargers!). Challenge yourself and your friends with this beautifully crafted puzzle and see if you have what it takes to make the light shine. Also use as an intriguing household decoration that is sure to attract the attention of guests and be a conversation starter!