I have carried a pocket knife through grade school, high school, college and I still carry one. The trick is to not take it out if it isn't needed.

Several years ago, I posted about the kit I put together for my daughter and her friends for hiking and camping. I gave them fauxtons and whistles on an adjustable cord bracelet. I didn't want to risk having it around their necks as they are active. If they do where it around their necks, I have them do so cross body, like a bandoleer.

Now, over four years later, I am happy to say that they still have their kits and have since modified and personalized it for their own use. My girls always take water with them whether they are schooling, or anything for that matter. Most of it is still intact, except the first aid components which get used up and replaced.

Just continuing being a good example and you shouldn't have to worry. Kids see and hear everything!