The children are playing their favourite musical instruments. After some practice, they’re all excited to go on a musical parade to Seagull Rock – everyone except poor Roisin. She can’t choose an instrument she likes, and her singing makes the other children laugh. On their musical march they come across Gull McGill, who is making the most of his own musical talents. He tells Roisin she just needs to find her own sound. The children join him in a song and Roisin’s cool back beat fits in perfectly. She finds out she does like making music after all.