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

DJ's Robot Blinds Control
Lazy much? Blind control to major tom... I can now control the blind/shades on my deck from my phone! With a little bit...

Redzone's Gideon Inmoov
I have not been here for sometime been busy with that dirty word, work. I have ,however, been redesigning my bottom half...

DJ's Revolution Snake
I dived into the box fresh injection molded parts from our manufacturer tonight and built this EZ-Robot Revolution...