Most girls look forward to when they can shave their legs for the first time, as it is something of a rite of passage for most girls. However, they may not be sure when they should start wearing deodorant for personal hygiene reasons. You might think they don’t need it yet, but if they ask for it, let them have it. Even if they don’t need it, it is something that is a good habit to have. There is something mortifying about arriving at school only to realize that it was forgotten. That child will then worry all day that they smell. Start the good habit early.
Personal hygiene should start long before it is an issue.