Helping the autistic

I am currently in my last year of school and i am doing a design technology project on helping someone with autism. I would really appreciate it if anyone could give me some ideas of things that help with autism. I would like to make something that can actually benefit them, so after doing some research i found things such as sensory lights or sound proof headphones. I chose to do this topic as i hope to learn more about autism in order to help friends i know with it. I would appreciate any help or suggestions, thanks