Please don't get hung up on the word "child." I can't think of a better genedereutral word.
Thanks @Angelina for the suggestion.
Let's assume that the child/teenager wants to wear a cb like @Ines . And let's assume that there are no laws prohibiting it.
What do you think from which age a child/teenager can/should wear a cb?
I'm especially curious about the answers of those who have been wearing a cb themselves since they were teenagers.
(Please also give detailed reasons for your answer. Please no two-liners).