Jetbot

This is an entirely DIY opensource robot. You cannot buy Jetbot from NVIDIA, they are not selling.
Complete bill of materials, hardware, software, tutorials, examples and full support, and supply is provided in github.

You have to follow the steps and build your own robot, which is fun and educative. There is a lot of chance to evolve more than what you have built, that's up to you.

Affordable - Less than $150 add-on to Jetson Nano
Educational - Tutorials from basic motion to AI based collision avoidance
Fun! - Interactively programmed from your web browser

Getting Started with Jetbot