"No they aren't.  You see, some are gas powered, some are electric, some are what you call nitro which is more powerful than gas.  But these things are as complicated as their car counterparts.  The man that created this engine for years was selling the engine for 7 grand.  I managed to get the blueprints and make a printed version to save thousands of dollars.  But this truck here is actually capable of towing an SUV.  I have actually done it before." He smiles and shows her the controller. "This controller is a mid range model.  It is $275, you can program it, specifically for the vehicle.  We have up to $800 controllers and they are just about infinitely programmable, allowing for you to program the engine down to the amount of fuel flowing into it and the rpm of it."