Magic Flashing LED Balloons. Magical LED Flashing Balloons are the latest craze for kid's parties and special events! Each balloon has a very simple to use inflating mouth piece that lets air in and not out! Inside each balloon is a small LED Ball which lights up and blinks very dramatically at just a simple movement of the balloon. This items ships in assorted sizes. Get more value by buying out 12-pack. This is a great product and really makes a party stand out from others.