to be colorful

I saw this documentary Educating Peter from HBO Signature few weeks ago. It was quite real. It basically would like to show a mental-disabled kid, Peter, to attend a normal elementary school and the teacher and other students there were trying to let Peter involve more in school life and meanwhile, to teach him what is right and wrong. I googled on line and found out that some critics think that is not appropriate because Peter may hit kids suddenly without any intention and it may hurt other kids. As I am not a person majoring in education, don't know if it is a right thing to let a mental-disabled kid to be involved in a group. What I saw from the documentary is that kids and teachers at that school are like angels. They're kind and willing to help. I think that is the most touching part in it. The kind humanity.