One day, a healthy boy named Tim went to the park with his mom. They saw a big rock. Tim's mom said, "That's a mineral, Tim. Rocks are made of minerals." Tim liked the big rock and wanted to take it home.
At home, Tim tried to separate the big rock into smaller rocks. He hit it with a toy hammer. But nothing happened. Tim was sad. His mom said, "Don't worry, Tim. We can try something else."
Then, something unexpected happened. A little bird came and pecked at the big rock. The rock broke into small rocks! Tim was happy. He said, "Thank you, little bird!" The bird flew away, and Tim played with his new small rocks.
