My learners were experimenting with open and closed circuits and made LIGHT!  They figured it out so so so quick.  We discussed open and closed circuits.  I showed them their materials such as; clothespins, wire, batteries,washers, foil, rubber band, fasteners, paperclips, and of course a light bulb.  They weren’t shown what to do or how to do it.  They were just trying to problem solve as to how to create a closed circuit so that they could produce light.  Success was found within ten minutes with the learners making a simple circuit, like the one above.  Then, they were challenged to make a more complex circuit using more that the wires, the bulb, and the batteries.  Within the next five to seven minutes, the learners experienced even more success.  Light bulbs illuminating our little Blue Ball world, literally and figuratively.