Worthwhile for adult/camp counselors to watch. And if you hear of a case of someone touching a child inappropriately, make sure the matter goes immediately to the secular authorities and is not handled "internally." Anyone concerned with issues of mesira or lashon hara can read this psak by Rav Aviner, or other articles discussing the issue citing to the Tzitz Eliezer and others. Better to be machmir on the issue of sakanas nefashos of the child than the potential for "mesira" which is probably not applicable because we live in countries with proper justice systems.
It would also be worthwhile to watch these three brief videos on speaking to children about proper guideliness which will, IY"H, prevent abuse:
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