Here are some signs to look for in the children in your life:

Lack of or delay in spoken language

• Repetitive use of language and/or motor mannerisms (e.g., hand-flapping, twirling objects)

• Little or no eye contact

• Lack of interest in peer relationships

• Lack of spontaneous or make-believe play

• Persistent fixation on parts of objects

• http://www.autism-society.org/what-is/