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

Ericez's My Real Size Wall.E Have A Job As Sales Promotion...
finally my real size Wal.e out of the house and work using Ez-Board, although there is a little problem with the wheel...

Pirumpi's Ez-B, I Would Like You To Meet Nodejs
I really love connecting electronics to the web and my EZ-B was not an exception. Last night I spent a couple hours...

Waynea's Tall Tower Light Controller - Ezb V4
Good Morning Ez-Robot Community. I would like to introduce myself. My daytime job is a Television Broadcast Engineer....