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

Jphillipsnj's Inmoov Project
This is my InMoov Project which is a downloadable open source 3d printing project that I am working on. Robot is life...

J's My Hexapod Project
This is what Im now working on now I finally have all the parts for it now and all my aluminum cut thanks to a local...

Mickey666maus's Oled Animated Eyes For ARC Pro And ARC Free
To set the project up, the following hardware is needed: 1x https://www.adafruit.com/product/3800 2 x...