Meet the Adeept PiCar Pro: an educational kit that comes with everything you need to build a smart robot car powered with a Raspberry Pi. This kit is compatible with Raspberry Pi 3/4 B/B+ boards. It has a 4DOF robotic arm to manipulate small objects.
You can control this robot with your iOS or Android device. It has object recognition, line tracking, obstacle avoidance, and real-time video transmission capability.