What can the reader infer about Lennie childhood and family life?
that it was hard for him growing up !
You mean "how"? Because his childhood is exactly that, his childhood. If you do mean "how". He was living in the slums and his family was very poor. His mother was uneducated, and his half-sister was apparently a prostitute for a while. Supposedly. Anywho, his mother and half-sister both died. His mother of alcoholism. You can infer from that how "great" his childhood was.