Here's a gadget which has been specifically designed to aid front seat passengers. Its a flexible reading lamp which allows passengers to read a book or search for something which has accidentally fallen on to the car's floor, without switching on the overhead interior lamp and disturbing the driver.
The flexible reading lamp has a 30-centimetre long stem which can bent in all possible directions. The lamp can be powered by plugging it into any 12v-port or the car's cigarette lighter socket. The price of the lamp is $ 14.95 (Rs. 700).
Source - Coolest Gadgets