There are many Robotic Kits available in the market like
1. Makeblock Robotic Kit
2. Lego Mindstorms Kit
3. Self assembled Kits (using Arduino)
The pre developed kits (1,2) are good but are very costly therefore how can we develop our own kits so that we can teach Robotics at a very reasonable cost. The self assembled kit discussed in the video may cost you Rs 1200-1500.