Your's OTTO

https://github.com/OttoDIY/DIY

Otto_BASIC added functions, gestures or sounds in loop
Otto_avoid Otto will avoid obstacles
Otto_push must change on line 53 Otto.walk(1,1000,-1); to Otto.walk(1,1000,1) to make Otto follow you!
Otto_run will run fast straight forward with this code
Otto_singleladies Dance single ladies by Beyonce
Otto_smoothcriminal Dance smooth criminal by Michael Jackson

It costs less than $15

https://gist.github.com/monhambe

Material:

MINI USB ATmega328P N