"Bart's Little Fantasy" is the thirty-seventh Simpsonsshort. It originally aired on The Tracey Ullman Show on February 5, 1989.
Plot[]
Homer and Marge force Bart, Lisa, and Maggie to clean up the mess in a room. While Lisa and Maggie start cleaning, Bart instead slacks off and tells them a story where children are parents and parents are children. The story is exactly the same as their scenario except with the swapped roles (Marge is Lisa and Homer is Bart). Homer and Marge catch Bart red handed and force him to mow the lawn as punishment. Lisa tells Maggie that they lived happily ever after and they wave at the scowling Bart mowing the lawn through the window.