They have dared each other to pour salt in their hands and hold ice till it burns, douse themselves in rubbing alcohol and set themselves ablaze, and throw boiling water on unsuspecting peers.
Now videos circulating on social media are showing kids biting into brightly colored liquid laundry detergent packets. Or cooking them in frying pans, then chewing them up before spewing the soap from their mouths.
"A lot of people were just saying how stupid I was or how — why would I be willing to do that?" 19-year-old Marc Pagan, who said he was dared to do it, told CBS News this week.