Betty wakes up in the morning after her birthday party. The house is a shamble, and Betty is not looking forward to cleaning up. She sings the title song while struggling with her chores. Grampy shows up to take Betty out for a drive, but Betty can't leave until everything is tidy.
Grampy literally puts on his thinking cap (a mortarboard with a lightbulb on top), and invents a host of labor-saving devices: a cuckoo clock powered dishwasher, a combination bicycle and floor scrubber, and a player piano that folds laundry. In no time at all, the dancing inventor has the house spic and span, just in time to take Betty for a spin in his automobile (which features a built-in soda fountain).
Notes
This is the first episode in which Betty doesn't have a separated layer of her hair shown.
^ abWebb, Graham (2011). The Animated Film Encyclopedia: A Complete Guide to American Shorts, Features and Sequences (1900-1999). McFarland & Company, Inc. p. 169. ISBN978-0-7864-4985-9.