My daughters love these bracelets. I got them to use as birthday party favors - and I have lots left over. The kids like to play with them indoors and outdoors. I may even consider purchasing them for Halloween give-aways. 100 for under $13 is a pretty good price and could help with safety and visibility. They're pretty bright and lasted well over an hour. (the kids went to bed and I threw them away so I don't know exactly how long they lasted) Only drawback - my daughter did a little excessive bending and the bracelet leaked. I don't know how toxic the chemicals are, so I would NOT recommend this item for younger children especially those who may be putting it in their mouths.