This is a cheap way to learn how to fly a remote control helicopter. Flight simulators let's you crash without having to spend for replacement parts.
One of the best is the Real Flight G2 flight simulator. The better your computer (e.g. more memory, fast graphics card) the better the simulation.
RC Helicopter Guide
Mini RC Helicopter - Remote Control Helicopters, Radio Controlled Helis, R/C Stores
RC Hobby Stores