Rumpel are just about to finish his latest invention a "Grouch'o'meter" after he goes to fetch the last screw he are mising, Finchen and Samson comes by the machine. They are very currious about what that strange looking machine does. Samson notice theres a scale going from "0" to 59 and a label with a "G" to a pointer that are pointing at the 0. Samson concludes that the "G" stands for grams, so the machine has to be for weighing stuff to see how heavy they are. They decide to try the machine out by weighing Finchen, but the machine are still showing 0, maybe Finchen are to light for the machine.
Ernie invents a machine that makes As -- you turn the crank "over here", you push the button on top, and out comes an A. But it doesn't work when it rains -- it only makes As when the sun shines.
A man asks kids about zero. (Includes an animated Oscar cameo)
Samson and Finchen decides to try to see if the machine can weigh a big bear since apparently a small snail was to small for the machine. Samson jumps up on the machine, but Finchen tells him that according to the machine he weighs 0 grams. Then Finchen realizes that maybe it's not a machine to measure weight, but what is it then for ?
Kids experiment to see what are heavey and what are light.
Samson thinks that maybe the "G" stands for "Grad" (degrees) so the machine measure temperatures. Finchen suggest that they make some hot chocolate and try to measure that. While they are away to make the hot chocolate, Rumpel returns with the screw, so he can finish the Grouch'o'meter, and he then leaves to get some junk so he can test his machine. Samson and Finchen returns with the hot chocolate, Samson pours it into the machine, but according to the machine the hot chocolate are 0 degrees. That can't be right the chocolate was hot, the only explanation is that the machine are not for measuring temperature, they decide to take a closer look at the machine.
Kids talks about machines that they want to invent.
As Finchen and Samson takes a closer look, they notice a button on the machine, they wonder what would happen if they pushed it.
Kermit talks about clues. He shows that a boy has grown some carrots because he has a hoe, a watering can, and a bunch of carrots. Next, he confirms that a man has built a birdhouse because of his wood, paint, and carpenter's tools. When he notices Beautiful Day Monster with a suitcase and an umbrella, Kermit assumes that the monster is going on a trip. The monster corrects him; he's planning to eat his umbrella, and uses the suitcase to carry the ketchup he'll use to eat it with.
A dog tries to get hold of a bone on a pillar.
Finchen pushes the button and the machine starts to make noise. Finchen concludes that it is a noise machine. Then Rumpel comes back with a cart full of junk, he are upset that they have started his delicate Grouch'o'meter. He then explains to Samson and Finchen that the machine measures how grouchy the junk are and he starts to put various junk into the machine. As Rumpel puts more and more junk into the machine it makes more noise and more smoke, until it explodes. Samson and Finchen thinks that it's sad that the machine broke down, but Rumpel are delighted. It was supposed to blow up so that it could make a beautiful mess with all the junk there was inside the machine.