Buy this item and earn 200 reward points.
You hand the Joker Clock to your spectator and ask he or she to turn the knob to any number and then cover the clock with the lid. You then take the clock and let is roll on its side. When the clock is finished rolling simply look for the little dot on the backside and it will tell you what number was selected! Announce your spectators selected number proving you can see thru solid objects!