I loaded up on glow necklaces and bracelets at the dollar store before our trip (thinking that would be something the kids would beg me for and it would cost 5 times as much in disney). I thought that I would be able to spot my kids better at night. (which really was not the case, since Disney is sooo well lit anyway. I handed them to the 3 older ones who were not as excited as I thought they would be ( for heaven's sake, they were in Disney for the first time and were already in sensory overload, so they didn't need anything else to make them happy.) The problem was the 2 year old naturally cried for one becasue everyone else had one. I gave him one too, even though I think the packaging says 3 and up. I thought "what harm could it possibly do?" Well about 5 minutes later a kid in line for a ride is pointing at my 2 yr old and saying "wow! look at that kid glowing!" Yes, he had bit through the tube and the contents were all over him, in his mouth, hair, smeared all over his face. I freaked out, not knowing how poisonous it was. Turned out he was fine.....but just my word of caution not to use these with the little ones or any biters. Also, my older ones were quite aware that much grander things were being sold in Disney than their plain old glow necklaces from the dollar store....so I don't know if it was worth the trouble or not.