I wouldn't know where to start but a robot that could interact with Autistic children, play games with them, use text to speech to tell them stories and help teach social skills would be a fun robot to build.
By Lemon
Other robots from Synthiam community

Tfitzrandolph's Custom Robot Build Wobble Frog
Hey all! I wanted to post to show a project I created using the EZ-Robot system. As far as robots go its a very simple...

Smitheken's My Track Driven Video Bot
I have used the track and servos as the base with the ez-controller and a wireless Ip camera, works good. I used a...

Daman's Yet Another Wall-E
So I built my Wall-E months ago after receving it the day after I finished Metal Box-Bot, but I havent got around to...