Hi Airamas,
Welcome! I suppose the idea of having the spectators feel like kids again is not part of your aim

Anyway I think I understand where you are comming from, though for me the issue is not about "age" but about "attitude".
I am very plesead that many of the great magicians besides being excellent performers, also seem to have a great interest in the history of the topic.
I - like many magicians - like to create my own effects and routines.
However, usually very little new is under the sun, and the elements of our ideas as well as of most other modern effects are usually quite old. Often the original ideas has been refined and improved by many of the great masters.
To be a serious magician requires in my mind general knowledge of (or at least interest in) how key ideas and techniques developed. Usually a 15 year old will lack this type of knowledge, however fundamentally it is not about age, but about attitude.
Out of 100 15 yr old magicians, and out of 100 45 yr old magicians only a small minority seems to care about the great masters influence and contribution to the ideas!
I care about this! A non caring 45yr old is a lost case, while a non caring 15yr might easily change attitude and soon become a serious and knowledgeble magician!! Thus please take the kids serious and try to teach them the right attitude!