"It's not a toy mate..."

Toy helicopters are any helicopter that does not have full directional control, which for all intents and purposes means it does not have a swashplate. Toy helicopters and often quite robust and easy for the beginner to fly, but time spent learning to fly them will not translate well to any more advanced helicopters. Spare parts are often not readily available, meaning that when the helicopter is damaged in a crash, it may be impossible to get it up and running again. Examples of toy helicopters are the PiccoZ.

In collective pitch ("CP") helicopters, the rotor speed ideally remains constant, and lift is varied by changing the pitch of the main blades throughout their entire rotation using a swash plate. This has a number of advantages over fixed pitch helicopters, including better control response, the ability to autorotate, and the ability to fly inverted. The price is a much more complicated mechanical design that is much more fragile than a fixed pitch helicopter. Electric collective pitch helicopters generally start at about 450g (1lb), and the smaller models are perfect for flying in large empty parks. The low mass also reduces the amount of damage done in crashes, and the helicopter can often be back up and running again quickly. The disadvantage of small collective pitch helicopters is that they are strongly affected by wind, limiting the wind they can be comfortably flown in to around 10-15mph. They also tend to have much more sensitive controls than larger helicopters, making them harder to learn to fly. Larger electric helicopters should not in general be flown in public places because, like nitro helicopters, they can be extremely dangerous. Source: RC Helicopter Wiki

Put simply, they're not toys.