Hiccup and Sneeze are two forest monsters that live together in Bibi's magical house even though they don't understand that being a monster and human are two different things.
Hiccup and Sneeze learn about the beach and the sea and decide to transform the living room into their very own seaside paradise, much to Bibi's surprise.
Hiccup and Sneeze learn what winter is. After learning that it snows and it's freezing in winter, they try to persuade Bibi to go somewhere warmer instead.
It's been raining all day and Hiccup and Sneeze are stuck indoors with nothing to do. Bibi comes up with a series of games and activities to keep them entertained.
Bibi tries on a wig, intending to get Hiccup and Sneeze's opinion of how she looks, but they don't recognize her! So she plays a trick on them and puts on different wigs.
After learning that Bibi was once a tiny baby, Hiccup and Sneeze become worried that she'll keep growing and growing until she won't be able to fit into the house anymore!
Hiccup is sneezing out of the blue and no one knows why. Sneeze and Bibi wonder if, like Sneeze, she's sneezing because she's scared, or perhaps she's just feeling unwell.
Unware that Hiccup and Sneeze are planning a surprise party for her, Bibi thinks that they've forgotten her birthday, and tells them that she's "feeling blue".
Sneeze is worried sick because he can't find his favourite rubber duckie, Herbie. Hiccup suggests they retrace his steps from the last time he saw Herbie.
Bibi is moving into her new house. Meanwhile, Hiccup and Sneeze are looking for a place to hide from a thunderstorm. This is the story of how they all met.
Hiccup and Sneeze want to set up an art gallery in Bibi's living room, but they don't have any art. They set out to create some, modeling for each other.
Bibi is helping Hiccup and Sneeze practice being explorers, so they can be real ones in the future. They sail to a dangerous island and trek through an ancient jungle.
Bibi wants to win Ellard's Amazeballs Dance Contest to surprise Hiccup and Sneeze with a chance to meet Ellard. Not knowing this, they offer to help Bibi prepare for the contest.
After watching one of Ellard's videos about pets, Hiccup and Sneeze want a pet too. Bibi suggests they have a pretend pet first, in order to learn how to be responsible.
Bibi wants to take Hiccup and Sneeze swimming, but they don't know how to swim and are too embarrassed to tell her. They find ways and means to avoid going.
After learning about outer space from Bibi and the kidlings, Hiccup and Sneeze are eager to explore it. Bibi makes them a cardboard rocket ship and they blast off.
Hiccup and Sneeze receive a package, but they don't know who it's from or what it's for. Along with Bibi, they figure out different uses for its contents.
