they dont work :/ me and my friends bought 1 at spencers at the mall and tried it in the foodcourt.. paul blart (what i call my mall cop) came over and asked what we were doing and we told him...he said he sees dead people...we all bursted out laughing

yur supposed to do it in a dark room with candles not in a huge food court unless u hav the glow in the dark one sold by toys r us