Devon Gundry, musician and co-founder of Soul Pancake, has composed melodies to help kids (and adults!) memorize the quotations from the Ruhi Grade 1 Children’s Classes materials. These songs are considered a work in progress but Devon graciously agreed to share them online.
You can find more of Devon’s music on Soundcloud: https://soundcloud.com/devongundry
You can find an introduction to children’s classes here on Bahai.org.