Raspberry Pi is a low cost, credit-card sized computer. It can be taken as a personal server and router. You could get a camera monitor by plugging camber to it, equally, the voice interactive function could be achieved if microphone and speaker are connected with Raspberry Pi.
Raspberry Pi extends 40 Pins to link with sensors and modules, which contributes to make all kinds of experiments.
This kit is produced for Raspberry Pi enthusiasts. You could acquire the knowledge of Linux, Python and other programming, as well as the application of sensors/ modules.