Marge and Homer say goodnight to their kids but all does not go to plan. Bart philosophically contemplates (first time and last) the wonders of the mind, Lisa hears Marge say "don't let the bed bugs bite" and fears that her bed bugs will eat her, and Maggie is traumatized by the lyrics of "rock-a-bye-baby"
Bart and Lisa quarrel over what channel they should watch. Repeatedly Maggie comes up to the television and changes the channel. The only thing they eventually agree on is to stop Maggie changing the channel. Later Homer is saying a speech about family matters and stops when the show comes back on.
Marge puts Bart and Lisa in charge of babysitting Maggie. They totally ignore her, and she receives an electric shock, falls down the stairs and chases a butterfly onto the roof only to fall off the roof.
Bart, Lisa and Maggie compete in a contest to see who can make the most disgusting burp. Marge objects several times, but was no use. When Homer comes home, he makes the most disgusting burp ever. The kids then congratulate him, much to Marge's disapproval.
Homer promises the kids chocolate milkshakes if Bart can catch one of his father's long football passes. Unfortunately, there are many obstacles to overcome, but Bart finally manages to catch the football, only with his mouth.
Bart, Lisa and Maggie play a game of "Space Patrol" while Homer and Marge are out. Lisa plays a superhero with Maggie as her sidekick, while Bart puts a jug on his head with the pretense of it being the helmet of an alien warlord. However, his head gets stuck in the jug and Lisa "frees" Bart using a croquet mallet.
Marge bakes a batch of delicious cookies and Bart attempts to steal them, when everyone except him and Maggie leave the kitchen. Homer and Marge come back to find the tray empty, but Maggie guides them along a trail of cookies running across the floor. The family catches Bart lying on his back in his bedroom amidst a pile of cookie crumbs.
Grampa tells the kids stories from the good old days. When the kids stop paying attention to him, he feigns his own death to recapture their attention. The short marks the first speaking appearance of Abraham Simpson.
Bart and Homer go on a fishing trip. Homer asks Bart for a bologna sandwich, but Bart forgot the bologna. He puts the bait on the sandwich instead. When they get the boat in the water they hit rapids and later fall off of a waterfall.
The kids are watching TV and Homer tells them to stop watching "Itchy and Scratchy" because it's "too violent".Unable to watch cartoons Bart puts on his own show, which eventually angers Homer even more.
Bart, Lisa and Maggie go to the movie to see "The Return of the Happy Little Elves" (much to Bart's dismay), but Bart convinces the girls to see "Revenge of the Space Mutants" instead. However, Bart ends up being scared by it, and Lisa and Maggie attempted to comfort him.