Ernie has gotten some lemon ice creams, and want to give Bert one of them. Bert tells him he don't like lemon flavored ice, so Ernie says that he will just have to eat both of them then.
Nils has just gotten some new vegetables, and since it's a sunny day he expects to get a lot of customers. Then all of a sudden he hears an explosion from Rumpel's kitchen. Nils is convinced that Rumpel's kitchen experiment is scaring away any potential customers. However, Rumpel doesn't belive him, so Nils suggests that they switch roles. Rumpel will take over the shop while Nils will be in the kitchen making explosions.
Rumpel goes to work straight away in the shop, by doing some Grouch cleaning. The phone rings and it turns out to be a customer who asks if he has any oranges, to which Rumpel replies that it's a silly question and hangs up. Nils attempts to protest the way Rumpel is handling the shop, but Rumpel just says to Nils that he hasn't heard any noises from the kitchen yet.
Nils goes ahead and attempts to make some noise and weird odors. He attempts with a few ingredient just to see what happens, the odor is so bad that he has to hold his nose, and decides to put the lid on the pot, resulting in an explosion and Rumpel congratulates Nils with a very good explosion.
The customer that Rumpel hanged up on arrives in the shop, claiming that Rumpel is the most unfriendly shopkeeper ever, Rumpel thanks him for the compliment. Just as the customer tells Rumpel that he will never buy anything from him there's a new explosion from the kitchen. The customer goes to the kitchen.
The customer asks if Nils was responsible for the noise, Nils admits it, and the customer continues by saying he was over at the annoying shopkeeper when he heard this fascinating noise. Nils immediately realizes that he has to add more ingredients, the noise was not supposed to be fascinating. The new explosion attracts even more people, and Rumpel brings in a basket of vegetables that the people immediately start buying. Nils can't believe how well the noise and odors worked.
Kids are talking about switching roles with their friends.
Ernie has trouble sleeping, so he decides to play his bugle to make himself sleepy. His bugle playing wakes up Bert, however, and Bert tells him to think before he plays the bugle, so Ernie decides to play his drums, but then Bert tells him to think before he does anything.