Query: Will my kids be able to fly the chopper without help or supervision?
Context: This highly depends on the model you choose for your child because some models really do need under supervision. However, battery–operated RC choppers are OK for kids, so you can leave the kids to fly their helicopters independently. Some brands are also particularly easy to control, so you can purchase one for your child with a minimal control channel, so that they can only fly a short range without going too far.