Angelica auditions for a part on a Romper Room-style TV program, ""Miss Carol's Happy House"". However, things get nasty after the audition when Angelica overhears the 74 year-old Miss Carol say nasty things about her viewers backstage; among these nasty things included a cuss word, which Angelica learns and says to her parents.

At his birthday party, Timmy McNulty bans the girls from playing because they have cooties. However, the girls get back at them by thinking that they actually have a contagious form of cooties.

Spike's attempts to save Dil from immenent danger gets Spike in trouble with Stu & Didi.

Angelica drafts the Rugrats to play her ballet troupe, so she can stage her own ballet recital to prove that she can dance. She did this because (1) she lied to Susie about taking dance lessons (Angelica was expelled from dance school after 2 classes), and (2) she did this to get back at Susie, who was chosen to be a lead at her class' presentation of Swan Lake. Angelica's biggest challenge is to get Chuckie to wear a tutu; he didn't want to, as he feels embarassed wearing one (obviously). The end result -- ""Angelica Lake"", with a pail of water for a lake, and Dil in his high chair as a tree. Meanwhile, Stu, Drew, Randy & Chazz work on Stu's roof, having trouble finding out what caused the roofing tiles to deteriorate.

Stu & Didi start a new baby book for Dil, to keep track of various firsts that will occur in Dil's early years. At first, of course, the book is blank, which led Angelica getting the babies to believe that Dil is not so smart. Trying to prove otherwise, Angelica and the Rugrats ""train"" Dil.

Chuckie thinks that he's not normal because he can color with either his left or right hand.

After seeing Reptar steal some cereal in a Reptar Cereal commercial, Chuckie writes a letter to him complaining about the commercial, with a little help from Angelica. When Chuckie decided to retract the complaint, Angelica said that it was too late, as she already ""mailed"" the letter. Chuckie becomes even more afraid when they go to the Video Cave arcade at ""The Mall"" to meet Reptar who, according to the commercial for ""Reptar's Revenge"" (his latest direct-to-video movie), is ""mad at someone"".

After looking at prom pictures in their parents' high school yearbooks, and the fact that Alisa is going to her own prom, the Rugrats have a prom of their own, complete with a limo and chauffeur (Dil in the Reptar Wagon), so they can decide who can be prom queen -- Angelica or Susie.

In another religious episode, Boris tells the story of Noah's Ark to the Rugrats. Following the story, Angelica sees a weather report on TV, where some rain is forecasted for the area, inspiring Angelica to trick the Rugrats in believing that there will be another worldwide flood soon, prompting her to be the one and only boss and the Rugrats to build an ark and collect two of each animal. However, being the one and only boss will backfire on Angelica, as she is, of course, the one and only.

The babies go on an imaginary tour of America when Angelica and Susie cause some damage at a picnic.

To help expand their minds, Chazz and Kira send their kids to the Happy Clown Daycare Center, endorsed by Dr. Lipschitz. Angelica informs Chuckie & Kimi that daycare can be dangerous, as it's where the "scary kids" go to play. When they got there, Kimi ended up having a ball, while Chuckie would rather hide in balls.