We connected an LED lighted fan to a 9-volt battery. We made sure not to stick it on our tongues. We then put four rubber-bands through the four corners of the fan and connected them with four markers. We took of the caps of the markers and turned the fan on. It drew only a dot and didn’t move further. To make it off balance, we took of three of the seven fins. The robot then started to move very slowly and the four markers started slipping a crunching to the ground. We then placed the rubber band closer to the bottom of the marker and it was stronger. It drew the milky way galaxy !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!