Uncle Gizmo is coming to town for a visit, much to Olie and Zowie’s chagrin. But through a mix-up of events, the kids learn that uncles can be fun too. / Olie tries to determine what he’d like to be when he grows up. And with the aid of Mom, Dad and Pappy Olie discovers some surprising results. / Olie and Billy learn the hard way, not to fool around with Dad’s inventions.