Aka S363E4. Alex and Abi try to play a violin in the Play School sound studio. They tune a ukulele, then Abi plays guitar, and they both sing in harmony. It's nine o'clock on the Rocket Clock with a paper plane made from sheet music inside. Abi reads the story 'Violin and Cello' by Catherine Greer, illustrated by Joanna Bartel and music composed by Alexander Lau. Alex demonstrates how to play a cello. Alex plays 'The Swan' while Abi dances with a feather boa. Abi and Alex play 'Twinkle Twinkle' and 'Incy Wincy' on water bottle chimes filled with water. Through the diamond window the Pierce Brothers sing 'There's a Bear in There'. Abi and Alex help Kiya and Dan use their voices to call the animals in for dinner on the farm. Abi and Alex sing 'Make One Wonderful Song'.