Focuses on a group of toddlers, most prominently Tommy, Chuckie, Phil, Lil, and Angelica, and their day-to-day lives, usually involving common life experiences that become adventures in the babies' imaginations. Adults in the series are almost always unaware of what the children are up to; however, this only provides more room for the babies to explore and discover their surroundings.
Didi brings Tommy to her work place - the local high school, for use as a visual aid. But when Tommy gets free and roams around campus, he becomes friends with a rebellious biker.
Stu and Lou enter Tommy in a beauty pageant for baby girls when they learn that the Grand Prize is the Kingfisher 9000 (a top of the line sport fishing boat). But will a dress and a wig fool Tommy's toughest competiton...Angelica?
Stu and Grandpa take Tommy to see a Grizzlies' baseball game. Tommy, however, is more interested in his balloon hunt than the game, and his balloon hunt helps make a very important play for the Grizzlies' player Bucky Majors..
Being mistaken for the son of the millionaire Ronald Thump, Tommy is kidnapped by some thugs named Bob and Mike. But the kidnappers soon find out that it was more trouble than it was worth when Tommy begins flushing their stolen loot down the toilet.
After hearing Grandpa's mythical story about a moose, the Rugrats go look for one.
Grandpa is supposed to play his trumpet at a Veteran's Picnic, but Spike runs off with his dentures. Tommy and Chuckie set out to get them back in the craziest wild-duck chase in the history of dental rescue.