But is that really necessary? Signature campaigns are here today, but we don't know if they are going to remove it at some point. Bitcoin is one of those things in your childhood that you learn but never get to use if you're not actually interested to it. Just because kids are good at using gadgets, doesn't mean that they are interested in using such currency. As a matter of fact, kids are only good at using gadgets because it's user friendly or intuitive.
The kid might have some other passion in life. Let him grow by himself and explore while he's still young. Don't take that away from him by making him to busy earning his own money through bitcoins.