These aren’t typical beaded necklaces – they glow after being exposed to sunlight! A great party favor for Mardi Gras, a birthday or any other fun event, guests will have a great time wearing these fun necklaces. Use these necklaces as giveaways at fun events and watch people eagerly wear the necklaces. Plastic. (2 dozen per unit) 30 with 5mm beads. Expose items to daylight to activate glow.