Child who can't remember names?

He shows many signs of autism, most noticeably attraction to one thing (in this case the same toy). The "getting in your personal space" is also part of autism, as autistic people have a different sense of what is comfortable and what is not. While the child may be autistic, it should not be a major concern if he can communicate his thoughts clearly, many people are slightly autistic in ways. However, if his behavior presents a learning disability, then I think this should be mentioned to the parents.