Fritz doesn't find it funny that his neighbor David is telling his sister Kim that he lives in a construction trailer. Kim doesn't like wastefulness and she thinks the construction trailer is cool and environmentally conscious. Fritz is told to stay in David's apartment for a day so he can brag about living frugally in the construction trailer. Kim sees through her brother. But Fritz and her play along with the swindle. Slowly David begins to suspect all the garbage and pointless electrical appliances he has at home. As the most continuous program on children's television that explicitly deals with the topic of 'environment', this episode explains, among other things, what the 'ecological footprint' actually means. In the funny and at the same time emotional plot, we can ask ourselves whether we actually need everything we consume - or whether the climate isn't worth following the motto 'Live well instead of having a lot' more often.