Demons attempt to lure the youth into sorcery. It's not at all new. They appear in dreams/sleep paralysis/out-of-body experience, and try to wow them or otherwise exert control over them.
The one of you with children must teach him or her to cast out the devil by invoking Jesus' name.
<In Jesus name, be gone!
It's that easy to handle. Recall that the devil cannot do anything without God's permission, and he's not going allow any kind of spiritual threat toward children that cannot be easily banished.