The episode revolves around the Fixies, a group of tiny creatures who fix things, and their adventures with a toy submarine made from broken toys. They face challenges while navigating the aquarium, including getting stuck and avoiding fish. The Fixies discuss the history of real submarines, from their invention in England 400 years ago to modern nuclear-powered vessels.
Later, the Fixies focus on a chocolate ball with a toy inside, which they try to repair. They learn about the process of making chocolate, from cocoa beans to the finished product, and the importance of vitamins for a person's health and memory. The episode ends with a math problem, where the Fixies use multiplication to solve a puzzle involving cherries and apples.
Here are the key facts extracted from the text:
1. The first submarine was made 400 years ago in England.
2. The first submarine was made of wood and dived shallowly.
3. Rovers with oars sat inside the first submarine.
4. The first submarine did not swim quickly.
5. 200 years later, the oars were replaced with a mushroom propeller.
6. The mushroom propeller was slow and easily overtaken by a good swimmer.
7. Submarines began to dive to great depths and reach high speeds when electric motors were used.
8. Modern large submarines run on nuclear fuel.
9. Submarines can stay underwater for months without surfacing.
10. Cocoa beans are the main ingredient in chocolate.
11. Cocoa beans are fried, crushed, and finely labored to make chocolate.
12. Cocoa butter is squeezed out of solid cocoa to make chocolate.
13. Adding milk to chocolate makes it milky.
14. Chocolate is often mixed with raisins, nuts, and sometimes flowers and salt.
15. The ancient civilizations did not eat chocolate but drank roasted beans mixed with water and hot pepper.
16. Vitamins are essential for a person's growth and health.
17. Vitamin A is necessary for good vision and normal growth.
18. Vitamin C helps to keep the body from getting sick.
19. Vitamin D strengthens teeth and bones.
20. People usually get vitamins from vegetables, fruits, milk, and other fresh foods.
21. Doctors recommend special vitamin tablets if the body lacks vitamins.
22. Berries have a lot of vitamins.
23. Eating vegetables, fruits, and berries can help to strengthen memory.
24. Learning the multiplication table can help to strengthen memory.
25. Apples are a good source of vitamins.
Please note that some of the sentences in the text were not included in the facts as they were either opinions or not relevant to the topic.