I just got my son this toy (the nano version for 30 eur), reminds me very much of this concept [0]. The little thing is a lot of fun and very robust and maneuverable with its tank-like control (forward backward for left right wheels only). This movie is not mine by the way.

https://www.youtube.com/watch?time_continue=105&v=C3Pry2nLaR...