Three former students of Kittredge Elementary School in North Andover, Massachusetts are featured on CBS Sunday Morning for their incredible project which started for them way back in second grade during recess. One child saw a rock sticking up from the ground. So, they started digging and kept digging for several years...every recess. This little rock turned out to be a very big boulder! They were convinced that there was treasure underneath the rock. They were right. Watch the video to find out what treasure they would find. It wasn't what they were expecting.