There are already plenty of educational robots on the market designed for beginners. The Transbot Pi is for more advanced students. It works with the Raspberry Pi 4B and has a 7 inch screen. It uses a Astra Pro 3D Camera for mapping and navigation.
This robot can be controlled with a handle and app. The companion app supports iOS and Android devices. It is ready for automatic driving, color recognition, AR tag recognition, face detection, and obstacle avoidance.