The old carpenter thought for a moment and said, "I do have some scraps of wood, but we'll have to find bamboo tubes in the bamboo forest. You're making a waterwheel model, so you'd better choose your materials carefully; this isn't an easy task." The old carpenter stood up and led Lin Yue and Wang Qiang to a pile of wood planks to begin selecting suitable ones.

Wang Qiang picked up a piece of wood and looked at it: "Grandpa, this one is good, the thickness and width are just right." He touched the wood grain and felt the texture of the wood.

The old carpenter nodded: "Yes, this piece is fine. You can take it and use it. Hopefully, you can make a good waterwheel model so the children can broaden their horizons."

Lin Yue said gratefully, "Thank you, sir! We will definitely try our best."

After obtaining the wooden planks, Lin Yue and Wang Qiang went to the bamboo grove outside the village. The bamboo grove was lush and green, and a gentle breeze rustled the bamboo leaves. Looking at the bamboo grove, Lin Yue was filled with joy: "The bamboo tubes here will definitely be perfect." She walked into the bamboo grove, searching for bamboo tubes of uniform thickness.

Wang Qiang reminded her from the side, "Lin Yue, be careful, some bamboo stalks have very sharp edges." His eyes were fixed on Lin Yue, afraid that she would get hurt.

Lin Yue smiled and replied, "I know, be careful too." She squatted down and carefully selected bamboo tubes, her face beaming with excitement. Before long, they had collected enough bamboo tubes.

Back at school, Lin Yue and Wang Qiang began making a waterwheel model. They cut wooden planks into suitable shapes and nailed them together to form the waterwheel's frame. Then, they attached bamboo tubes to the edge of the waterwheel. Lin Yue held a hammer, carefully hammering in the nails, her eyes focused, fine beads of sweat appearing on her forehead.

Wang Qiang helped hold the plank, and looking at Lin Yue's serious expression, he smiled and said, "Lin Yue, you're almost a professional carpenter."

Lin Yue wiped her sweat and said with a smile, "I have to learn everything for the sake of the children."

While everyone else was busy, Chen Yu wasn't idle either. He searched all over the village for tools, borrowing scissors, rope, nails, and other implements from the villagers. He neatly placed these tools in a box and brought them to school. "All the tools are here. Does anyone think we need anything?" Chen Yu asked.

Zhang Feng looked up: "We don't need any more for now; these tools are enough."

After several days of hard work, the homemade teaching aids have made great progress. Counters, flashcards, waterwheel models, and other teaching aids are gradually taking shape. The children's eyes are filled with curiosity and anticipation as they see these novel teaching aids.

A little boy ran up to Lin Yue, tugged at her clothes, and asked, "Teacher Lin, what are these? They look so interesting." The little boy's eyes were bright, and he had an innocent smile on his face.

Lin Yue squatted down and smiled at the little boy, saying, "These are teaching aids we made for you. You can use them to learn better in the future." The little boy jumped up excitedly, exclaiming, "That's great!"

Seeing the children's excitement, Lin Yue and the other educated youth felt incredibly gratified. They knew that although these homemade teaching aids were simple, they embodied their love and hope for the children. These aids would become helpful tools on the children's learning journey, helping them open the door to knowledge and explore a wider world.

However, the process of making teaching aids was not without its challenges. Sometimes there weren't enough materials, requiring them to search for more; sometimes the methods were incorrect, necessitating restarts. But no one gave up. Each difficulty strengthened their resolve to create better educational conditions for the children. They encouraged and helped each other throughout the process, everyone striving towards the same goal. This spirit of unity, like a bright flame, burned in this humble school, illuminating the children's path to the future.

In this hopeful school, the act of making teaching aids is not only about solving the current problem of educational resources, but also a transmission of love. Lin Yue and the other educated youth used their own hands to weave a cradle full of knowledge and dreams for the children, allowing them to feel the joy and hope of learning even in difficult circumstances. Their efforts, like seeds in spring, planted a thirst for knowledge in the children's hearts, waiting to take root, sprout, and grow strong in the future.