10 kids catches a thief

This is strange... Last night, a 56 year old man was caught stealing by a group of elementary school boys.
10 students (4 fifth graders and 6 sixth graders) were in the second floor of a library and a boy witnessed a man stealing a wallet out of one of the boys' bicycle basket through a window. He immediately told the others and they all chased him down. Approximately 100 meters away, they cornered him and the librarians called the police. The man immediately surrenders, and none of the boys were hurt.
Oh, and stealing a little boy's wallet wasn't a wise choice for him because it only had 120 yen inside ($1.20).