GREENFIELD, Wis. -- Usually, surveillance video is used to capture crime, but this time the cameras caught kindness from a kid.

The video shows a young boy walking into the Greenfield Police Department in Greenfield, Wisconsin, leaving behind a small bag and rushing away.

Inside the bag? His own money that he wanted to donate to police.

The child left no note and no name.

But police were motivated to locate the boy so they could thank him for his gesture.

They eventually found him.

The boy, 11-year-old Max Siepert, donated a total of $10.03 in coins, which he had worked to save throughout the summer.

But why did he focus on donating to the police department?

"My grandpa, who I never got to meet, he was a police officer, and he died at the line of duty," he says.

Max, a 6th grader, hopes his kindness motivates others to be just as generous.

"One day that's going to make a difference," Max says. "If every person would do that, we would such a great world. It would be awesome!"