Thomas en Senior op het Spoor van Brute Berend

Three children and their uncle find a magic painting in the uncle's attic. When they pronounce a spell, a lady named Esmeralda emerges from the painting. The lady must return to the painting, unless certain conditions are fulfilled. A magic drink, which makes them invisible, should help them. Two thieves (who seem to like nothing but cakes) kidnap one of the children to require a ransom. And it is found that a man, the father of Peter Faber (that's the name of an actor too, but not in this movie) is needed for help. That is not easy, since the they are not on friendly terms with Peter and his father.

Frans, an elementary school teacher gets involved in a conspiracy to save Geert-Jan Grisenstijn from the hands of his uncle, the evil count.

Martijn receives little attention from his parents, who run a village bazaar, and is often left to his own devices. He has plenty of imagination, but cannot live up to the expectations placed on him. If he fails his school exams, he will be doomed. Only his grandfather in the retirement home understands him and listens to his stories. When a film crew arrives in his hometown to shoot a fairy tale movie, Martijn is chosen for the lead role and his grandfather is given the role of wizard.

Young Peter has a difficult time adjusting at school having been confined to a wheelchair after an accident. He still wants to participate in the school outing and play and wants to come up with a way to make the play actors 'fly' like fairies. By chance the local inventor Quirinus Drijfhout and his son Felix have just perfected their 'Zerostraler', a machine that can make any object float in mid air.

Artist Hans Drost and his children have a spectacular hobby: rockets.

A gang of city children is secretly practicing to enter a musical competition. All of them plunder their parents' supplies in order to build their own stage and amplifiers. Baffled by these unexplained thefts, the parents decide to hold a meeting as their suspicions turn to a group of camper folks living across from their flat. The tables are turned when the residents take a camping holiday of their own and end up being mistrusted by the locals as much as they themselves did their own neighbors. Meanwhile, the children's gang meets a rival group of kids who are planning to enter the same competition.