Raspberry Pi is a credit-card sized computer of low cost with Raspberry Pi OS as its official system and also compatible with other systems like ubuntu and Windows IoT. Furthermore, it extends out 40 pins to link with sensors or modules, which makes conducting all kind of experiments possible. You could get a camera monitor by plugging a camera to Raspberry Pi. Equally, the voice interactive function could be achieved if a microphone or a camera is connected with it.
And this is a purpose-built kit for Raspberry Pi enthusiasts, through which you could acquire knowledge of Linux and Python, Java and other programming languages, as well as the application of sensors or modules.
Raspberry Pi and electronic components are controlled via Python.