I had not heard of the “Charlie Charlie Challenge” until today. I watched a couple of these videos and was disturbed. I immediately sent a text message to my kids, and immediately I received response “of course not” or words to that effect. So this thing really is viral because they heard about before me, and I live and work on the Internet.
It might be prudent to warn any of your kids who may be at an age that they might be exposed to this challenge, as well as friends and relatives with kids, to take steps to warn the kids about messing with the stuff
It’s an invitation to the Demonic realm to have some sort of interaction with the participants, opening the door.