Meet Barney's new pal, Riff, a dinosaur who knows how to find music everywhere, in this episode of the award-winning, perennially popular show. A little girl has big dreams of playing her violin at the fair, so Riff teaches her and the rest of the gang all about rhythm, instruments, and music. Meanwhile, the group plays educational games, tries out the rides at the fair, and sings irresistible and infectious songs.