New friends - Richie at the Nursery

When Richie reaches his classroom, all his friends gather round him and they shout "yeh,yeh" loudly, moving their hands in the air. All his classmates are Japanese, with the exception of him, but where does it bother the kids? They are happy to have a friend. He adores them and they too in turn do the same.

Sensei (means teacher in Japanese) says that they play together, but it seems sometimes Richie shouts at them if he likes some toys and someone tries to take it away. Possessive, isn't he?