CupRobot
Here is a great weekend robotics project to undertake with friends or folks at your local maker space. You will need a 3D printer handy to 3D print the STL files attached as part of the steps below and a Cup, in my case, I am using a Venti Cup from Starbucks which i saved after enjoying my ice coffee.
Here is a video demo of the CupRobot in action
https://www.youtube.com/watch?v=HdFsBculJEM
For more check out the blog post at - https://www.element14.com/community/community/project14/robots-with-wheels/blog/2018/04/02/robots-with-wheels-cuprobot