Once upon a time, by a pretty river, there was a beaver named Benny. He lived in a snug burrow with his mom and dad. Benny loved to build dams and play with his friends. But one day, something he didn't expect happened.

While Benny was munching on a crunchy twig, he felt something strange in his mouth. "What's this?" he thought, touching his teeth. Suddenly, one of his teeth fell out! Benny held the tooth in his paw, surprised. He had never lost a tooth before and didn't know what to do. Was this okay? Was he going to be alright?

Benny ran to his parents, worried. "Mom, Dad, look!" he said, showing them the tooth. His parents smiled kindly. "Don't worry, Benny," his mom said softly, "this is normal. Young beavers lose their baby teeth to get big, strong adult teeth."

Benny's dad agreed. "Yes! And it means you're growing up. Your teeth will be even better for chewing wood!"

To cheer him up, Benny's parents told him about when they lost their teeth as kids. They even showed him a special spot in their burrow where they kept their first lost teeth. Benny listened, feeling better and interested.

Soon, Benny's friends came to see what was happening. They talked about their own lost teeth, and Benny began to laugh and feel proud of his missing tooth. His parents made a little necklace with the tooth, so Benny could wear it like a badge of courage.

After that day, Benny wasn't afraid of losing teeth anymore. He understood it was part of growing up. With his parents' help and love, he was ready for any changes in life.

Benny kept having fun by the river, building big dams and playing with his friends, wearing his tooth necklace. It always reminded him of the day he learned something very important about growing up.