Taffy takes the Rugrats to a high school basketball game, where the Hornets are playing the visiting Poodles. However, Taffy ""volunteers"" herself to replace one of the cheerleaders, after one of them, her best friend Britannica, sprained their ankle, after Taffy caused their pyramid to collapse. As she does so, she leaves the Rugrats alone in the bleachers while she fills in for Britannica.
When Taffy comes over to babysit the Rugrats, she is upset that the band will break up, all because they feel that she is affecting her performance in the band. When Taffy says, ""I'm not myself"", Angelica tries to cheer her up by dressing like Taffy. However, this created a new problem -- the Rugrats think that Angelica, wearing one of taffy's hair clips, has become Taffy; while Taffy, calling the bandmembers ""dumb babies"" over the phone, has become Angelica.
When Taffy takes the babies on a picnic in the park, Phil bonds with Dusty, a young "sanitation artist" picking up trash, who is eventually revealed to be doing community service for littering.
The Rugrats coat Dil with ""Baby Power"" (baby powder), so he could be strong enough to beat Spiffy in a game of Tug-Of-War. Shortly afterward, though, an earthquake strikes the city, leading the Rugrats to believe that Dil has too much ""Baby Power"", so they try to find a way to make him normal again.
The earthquake has given Stu an opportunity to try special earthquake safety helmets on the Rugrats, the newest product from Pickles Industries, ""the first name in disaster"".
Lil tries emulating her prim and proper twin cousins from England, while Phil works to persuade her to stay messy like him. Also, Angelica pretends that she's American royalty.
Dil's first Christmas finds Santa Claus driven to quit the toy-giving business by Angelica, who's unhappy about her gift: a "dumb" reindeer doll. Elsewhere, the grown-ups get snowed in at a re-creation of a pioneer cabin designed by Stu.
When Hollywood celebrity Mack Granite visits the coffee shop, he got more than a decent cup of coffee -- he also finds the perfect person to play the role of a little girl in his next film. And Kimi is -- that girl. But, when Mack says that Kimi is going to be a star, the Rugrats though that she'll be up in the sky, twinkling.
Didi wanted Stu to clean up the living room for Boris & Minka's visit, which includes putting the toys away. Sarcastically, Stu says that he would put the toys, and the babies, into the crawlspace. Angelica interprets this by banishing the Rugrats to the crawl space, where they could play there, while Angelica has the living room all to herself, to the displeasure of Susie. Meanwhile, Stu invents an automatic plan
The babies must solve the mystery of Chuckie's missing plush bear during an overnight train ride in celebration of Boris and Minka's wedding anniversary.
