Useless Bouncing Car

This car is based on the useless machine principle and cheap geared motors (AlieExpress). When the switch is pushed to the other position, a DC motor reverses direction of rotation. It bounces between obstacles and will continue to do so until you stop the power supply.
In case the car runs in the wrong direction, you can turn it upside down
or reverse the battery leads.

Fix the 9 volt battery with two tie wraps or double sided adhesive tape.
https://youtu.be/G0m8ZMd5w48