A 12lb chunk of wood and metal flying at 100mph with a 14" blade spinning at 12,000rpm on the front isn't a toy. These things are model aircraft - calling them 'toys' completely trivializes the damage they can do when they hit things or, FSM forbid, people.
Don't take building and operating one of these models lightly. People have been seriously injured or even killed by them. The regulations that govern building and flying them are there for everyone's safety, and you can learn more about the U.S. regulations by going here: http://www.modelaircraft.org/