Bob is a security robot and one of the Micro Explorers.
They are coming to Earth but don't know why?
What happened to their memories and what is in the ship using most of their power and not allowing them access?
They must land on Earth to repair their ship and somehow regain their memories. They found the internet and are studying our world and mostly wasting time on You Tube.

https://www.youtube.com/watch?v=Xt5wUhgOnnU
https://www.youtube.com/watch?v=j67rsJ-YFNA