When Rattles's mom starts dating Archie Vanderloo, Rattles finds himself spending lots of time with Archie's kids. The problem is, Rattles doesn't have anything in common with these twins! Can this blended family learn to get along? Educational Objective: Rattles learns how to adjust to life in a blended family. Arthur offers to babysit so that his parents can enjoy some peace and quiet in the backyard. What could go wrong? With D.W. on the loose... just about everything! Educational Objective: Arthur and D.W. learn when to ask for help.