Thousands of people around the world are simultaneously participating in The World’s Largest Swimming Lesson to spread the word that swimming lessons save lives. The event, held in partnership with the World  Waterpark Association, also serves as an attempt to break the Guinness World Record for the largest swimming lesson. Anyone can take part and possibly make history. Attend and receive a certificate valid for free swim lessons for a child ages 6 months to 4 years. Priority registration and skills testing for the Learn-to-Swim program will also be available. Register in advance online (336729-00), at any recreation center/indoor pool, or at the event. All ages; free.