These are unique audio flashcards to earworm the sounds and meaning of new words into your brain. We take a new word; in this case "tent," and created a musical rhythm from recordings of the different sounds of a tent. Then we repeat the word to the beat. It is unique (maybe even annoying lol:) but it will stick in your head. This should help you learn the word but also get a better sense of how the tones and rhythm of spoken Chinese should flow.