The Raspberry Pi is a wonderful platform for building and programming robots. The Yahboom Raspberry Pi 4B AI Mecanum Robot (Raspblock) is a kit with everything you need to get started faster. It lets you build an omnidirectional robot capable of autonomous driving, object recognition/tracking, and voice broadcast.
This robot comes with a 3DOF camera with 180-degree tilt and pan capability. You can debug it through a web browser. The code can be modified in Python. The Raspblock can be controlled via your phone or PS2 joystick.