I hate to guess how many kids are giving themselves tinnitus right now. It's just not possible to communicate the seriousness of long term problems to kids, they have no context for what long term really means yet.
They are pricey, but such a good investment. Way better than anything else I've tried, more comfortable for extended periods of use and most importantly they attenuate the sound fairly evenly across the spectrum.
My only advice is to get the string attachment option, so that you can't accidentally lose one of them!
I ride a motorcycle and needed something to make sure I don't lose my hearing from the wind noise/exhaust noise (it's stock, but still 85 dB when the throttle is open).
They are also great for concerts and live music events where the speakers are generally cranked up to 90 - 95 dB.
I got the 27 dB version, and it allows me to hear what people are saying above the the music but really cuts out the painful parts.
They are not cheap, but I already have tinnitus, so I want to make sure it doesn't get worse.