"How can we make our little castle warmer, more suitable for children to live in?"
After the ice house was built, everyone gathered to ponder this question.
Although their ice house was backed by a big ice mountain, which could shield them from a lot of the wind, there was still wind blowing through.
"If only there was something to cover us all," Tu Qiu muttered to himself.
His unintended remark gave Jiang Xiaobai great inspiration.
When he was young, he saw villagers in Nanwan Village using greenhouses to grow vegetables. Vegetables are afraid of the cold; many can't grow in winter except for those cold-resistant ones. But inside a greenhouse, even those not resistant to cold can survive.
"Do you know about vegetable greenhouses?" Jiang Xiaobai asked.
Everyone looked at him with confusion.
Jiang Xiaobai described the concept of vegetable greenhouses, and many people understood the principle.
