I think it depends upon several things,
What your local infection rates are like, who's double jabbed, who's follwoing guidance such as hand, face and space etc. and how many youngsters who are not jabbed liley to be involved with this event you are thinking of.
The bigger one is the behaviour local to you in general, anyone being cautious or has caution gone to the wind as in many places?
Being outside is a winner, ventilation is king, but you will have common touch points and using the same eyepieces,
the eye is a quick way in for infection after all.
My cautious side wins and based on what I am seeing in behaviour, your idea is a good idea, but listen to your cation this time and don't do it.