Super nice to be in the water. definitely the ocean changes things reporter: over the years lahaina legend robert cotter affectionately known as uncle bully taught most of these kids how to surf. now he is teaching them how to heal joy is one of the most powerful tools as far as medicine goes to helping people recover. reporter: as long as there is a little bit of a slice of joy she ll be ready with the boys. they don t know where they re going to live, when their school is going to be ready. there are so many unknowns right now that is one thing we want to give some certainty and it is where there is no certainty. reporter: a wave of ocean therapy washing in just when it s needed most. steve patterson, nbc news, maui love to see that joy. that is nightly news for this sunday night.