I invented this cake after looking at dozens of pictures of lie detector tests online. It isn't an exact replica of any of them, but I tried to put lots of details in it to make it realistic. The entire cake is edible, most of it is fondant, with the "paper" made of the wilton paper sheets. I hand painted the lines on it, as well as the printout. The cake is in various shades of gray and white. The actual cake was vanilla, with cherry filling and almond cream cheese frosting. The little sensors could actually move and I made little fondant screws to put them together by pressing a screwdriver into the ends of the fondant pins. i made the copper wire with a clay extruder.