Well i guess no need to explain about bitcoins to teenager or children because when they see bitcoins at many place they will get interested in it that what is this? and the will themselves google it and starts learning about it. Like me i never learnt about bitcoin from anyone.
might be true, but they could make mistakes, since they learn on they own and nobody is perfect right from the start. but i guess it's not to bad as they should only handle small sums and if they get scammed it will be a valuable lesson that was not to expensive.