小朋友知道乌鸦的办法是怎样让水面升高的吗？可以做个实验看一看！遇到困难的时候，应该像故事里的乌鸦那样，尽量想办法解决问题。

How did crow raises the water surface? We can do an experiment and show it to our children. When encounter difficulties, we should try our best to find a way to solve the problem, just like the crow in this story.