The Swimways Hydro Ring Kids Pool Dive Toy is the perfect outdoor game for family fun in the sun! Blast rings 5 feet away underwater with Swimways Hydro Ring for a fun underwater pool game! No batteries are required to play, simply submerge under water, let them sink, and then dive to collect! These pool and lake toys are great for everyday play, summer pool parties, and for swim training - kids won't even know they are building their underwater swimming skills!