Summarize the events described in the text.

The text describes a group of schoolchildren who decided to go for a hike in the forest on a warm autumn day. They got carried away collecting leaves and didn't notice the wind picking up and the sky darkening, leading to a rain shower. They ran to a forester's hut where the forester, Uncle Grisha, lit a stove to warm them and gave them hot tea with jam. After the rain stopped, the children went home, having learned a lot about animals and their habits. They will remember this hike for a long time.