Age does matter because if that someone doesnt really have idea on what he/she receives then it would just be a waste of those coins or would be totally lost in void which is a sad part.

Whenever you do consider on gifting bitcoins to a minor then you should take the full responsibility of its recieving wallet and on the time that certain fella is able to understand things
then this is where you do explain to it which i would see to be a better move to be made and not just sending out without minding about those probabilities.