Simka and Nolik enlist the help of their Fixie School classmates to beat Tom Thomas in a game of table hockey, but to win they must learn to work together as a team.
Nolik is sad that he can't go sledding with Tom Thomas, and so he pours oil on the desk to make it super slippery. Unfortunately his whole Fixie family ends up getting stuck in the oil slick.
Digit feels unprepared for his pack-o-mat exam. Nolik tries to help him out by getting Grandpus to reveal what the topic of the exam will be. If only Grandpus would stop changing his mind.
Fire, Verda, Digit and Toola have made plans to visit Simka like "real guests" who first ring the doorbell before entering. But their plan is blocked when they discover that the doorbell isn't working.
Tom Thomas agrees to take care of his friend's chameleon. When the chameleon escapes from its terrarium, Tom Thomas, Simka, and Nolik have to use their smarts to find him and catch him.
Tom Thomas' dad tells him he can join him on a business trip to Africa if he is as tall as the top of that continent on his wall map. When a water level confirms he isn't, Tom Thomas tries to figure out how to fake the results.
Papus wants to move because nothing in the apartment breaks anymore. Nolik and Simka think the only solution is to break things so Papus will have something to fix and feel useful again.
After Nolik makes a pack-o-mat out of modeling clay, Fire takes him around the apartment to fix everything ahead of Simka. Their sloppy work almost results in disaster.
Tom Thomas gets angry at Nolik, which makes Nolik get mad at Simka, who then gets mad at Toola. Toola convinces her friends to create a chain reaction of positive feelings.
The Fixie students think Grandpus is playing a trick on them when he is able to identify what is inside the boxes in Professor Eugenius' warehouse without even opening them.
Nolik becomes worried that Tom Thomas won't need him anymore as a friend after Professor Eugenius replaces the leg of Tom Thomas' favorite toy bear with a prosthesis.
Fire and Nolik decide to play a mean trick on Toola with a talking doll that Professor Eugenius brought to the laboratory. When Simka discovers what the boys did, she figures out how to get them back.
Grandpus finds Nolik's drumming disruptive to Fixie School, and so Nolik goes to practice at Tom Thomas'. But when Tom Thomas joins in, Nolik finds himself wishing things would be quieter.
After Tom Thomas breaks his brand new Christmas ornament, Nolik tries to cheer him up with a kaleidoscope. But Tom Thomas' spirits aren't lifted until all of the Fixie kids join in to create an extraordinary design.
Nolik is kicked out of class for repeatedly calling out on the subject of where tubes and pipes can be found. But once outside of class his keen eye saves the day when he spots a leaking tube in the laboratory.
