It was the second class in STEMland at Isaiambalam with the 4th graders. I asked the children to display what they learnt in STEMland. Some children wanted to play strategic games with the visitors. Some of them wanted to light up LEDs.
Then I taught them few concepts that they should have known before building real circuits. I showed them how to light up two LEDs in series. Then children built circuits on their own.
I gave them a simple task to light up 4 LEDs using a 9V battery. Gurumoorthy figured out a way to light 4 of them. He put two LEDs in parallel and connected them in series. For a 4th grader to figure out these was something special.