Flashing Colourful Soft Silicone Jelly Bumpy Rings (Ctn of 24) and Add Fun to All Kids Parties, Adult Gatherings, Stag and Does and Make a Great Fundraiser for Any Charitable Organization LED rings are adored by children and adults too and are a great compliment for all celebrations, kids parties, and can be used for fund raising for any organization. To activate, simply press on the ring and it will start flashing. To stop, press the ring again. Use again and again. Non-replaceable batteries are included and installed. Our fun and flashy bumpy rings are made of a soft stretchy, jelly material. Each box contains 48 rings: red, clear, yellow and green.