Helicopter

It'll blow nearly rupees 3000 of your money.
The "brain" (configuration system) has to be made by very fine technique, & it's not readily available anywhere. You'll have to spend a week in just finding a shop from where you can get the material required to make the helicopter's configuration system.
You just have 5 days!
Think of a simple one.

I hav one more simple technology.....
But I will tell u dat in skool....