Stair climbing 100% autonomous robotic vacuum that cleans animal mess, no one has done this yet. I will admit it's very tricky but i'm sure it can be done! : )
Other robots from Synthiam community

Justinratliff's Finley Themed Robot
Robot Name: Finley Named after Finley the flying monkey assistant in the movie OZ, The Great and Powerful,...

Smarty's Synthiam Arm
hi there, here is one of my robot projects: The EZ-Robot Arm tell him what to do and he does it.

DJ's Robotis XM430 Dynamixel Arm With Open CM9.04
I was using a robotis arm for picking stuff up - albeit nothing special, but thought the process might be useful to some...