While Mom and Dad are away C will play???

In case you are wondering, C did great for Grandpa and Grandma while we were away on our cruise. They assured us that he didn't miss at all.....thanks! Well, truth be told we were so busy having fun that we didn't miss C too much either. Although on our drive home we couldn't wait to see him. We were told about all the fun things Grandpa and Grandma did with C, but I found this picture that doesn't look like much fun to me. And why is Grandpa sitting and resting while C is working so hard?