We never got to do stuff like this when I was in camp! On August 1st, we took the Mendel RepRap 3D printer, assorted electronics goodies, and one of our Neurosky EEG headsets to the Grand St. Settlement’s Computer Clubhouse for an afternoon mini-Maker Faire, kid style. Three groups of campers came through and got to experience the magic of seeing objects being constructed in plastic before their eyes, got quick tutorials on how to build a circuit, and stuck LEDs on, well, everything they could think of. This ingenious young maker crafted a 2-layered paper heart, attached it to a headband, and added yellow and red light-emitting diodes to the surface along with a CR2032 3-volt coin cell battery. The negative legs of the LEDs are secured under the anode, or negative underside, of the battery. The lights are turned on by pressing the positive legs of the LEDs against the cathode, or positive side, of the battery.