Our fourth meeting was today. Also, Bobby became an offical member. Andrew was not there either. Al and I took WALL-E apart(again!) and put him together a different way. We also added two light sensors, so it can follow lines. Then Alan tought me how to program it to use those sensors to find a line and align itself. then we did to team challenges. One was when we stood on a piece of fabric and had to flip it over without our feet touching the ground.It was hard, but we worked together really well and sucessfully completed it. After that, we had to guide a blindfolded partner through a maze of of bottles without knocking any over. Today's meeting was very fun and challenging!