Robot car kit additions: U.S. mount, standoffs, and bumpers

These things are designed with Tinkercad. Edit them online:

The Banggood kit: https://www.banggood.com/DIY-L298N-2WD-Ultrasonic-Smart-Tracking-Moteur-Robot-Car-Kit-For-Arduino-p-1155139.html?rmmds=myorder&cur_warehouse=CN

US sensor HC-SR04 (included in that kit): https://www.banggood.com/search/hc-sr04.html

A video explaining how to assemble this kit: https://www.youtube.com/watch?time_continue=604&v=eKcKdMb_nkQ
in this video, the US sensor is attached with a makeshift wire. This part will make it really attached. In addition, standoffs are missing in the kit, you can buy, or you can print. I made 5, using 2 for the motor controller, and 3 for the Arduino.