Yusuf and Aya's mother asks them to help her with the gardening, but they ask her to let them play. However, they discover that playing is boring without their mother, so they help her with the gardening, and then she plays with them.
Yusuf and Aya ask their father to help them with their homework, and he encourages them to do it independently. However, they take a break to understand the meaning of "the good word", and after they know it, they proceed with doing their homework.
Yusuf and Aya fall ill, so their grandfather prepares tea for them to help them recover. However, the grandparents get infected, so Yusuf and Aya go to the garden to bring the ingredients needed to make the tea.
As Yusuf and Aya go to feed the fish, they discover that the pond is empty of fish and that the plants are in poor condition due to water pollution resulting from the accumulation of waste. So, they clean the forest and separate the waste to recycle it, and the water becomes pure.
Yusuf, his father, and Aya build a windmill, but the wind breaks it. However, their father tries to encourage them not to give in to despair and to start building another one. Indeed, they succeed in building a new windmill, and the wind helps them operate it.
Yusuf and Aya play with water while the farm suffers from drought. Their parents advise them not to waste water, so they start collecting the water they waste and learn ways to conserve water.
Yusuf and Aya feel bored after they finish playing with blocks, so their grandmother gives them lemon seeds to plant. As they stay next to it waiting for it to sprout, their grandmother teaches them to be patient until it grows and explains to them the necessity of patience in life.
Yusuf and Aya borrow a book from their father's library, which talks about the invention of the airplane. Their father explains to them that the invention of the airplane was inspired by nature, as are all inventions. So, they begin to invent things inspired by nature.
Yusuf and Aya admire their grandfather's watch and ask to borrow it from him. They return the watch to him and surprise him with the kunafa that their grandmother prepared. So, he is happy with them for being trustworthy.
Yusuf and Aya watch their grandmother divide the last cup of juice fairly among all the individuals, so they understand the meaning of justice and begin to spread the idea of justice among all the animals until they are sure that justice prevails everywhere.