It is Show and Tell at the Kids Club, and Ruby has brought a very special item along. It's an old music box with a beautiful, dancing ballerina inside – Princess Betty. She explains to Alice that it's very precious, and that she never locks it as she doesn't want Princess Betty to be trapped inside. \n\nMeanwhile, Caitlin and Euan are practising a magic show for Show and Tell, but it isn't going to plan. When Ruby shows Molly her box, Molly accidentally locks it. It's a disaster. Molly needs to find a tiny key – and fast.\n\nWhen Caitlin and Euan take to the stage, the magic show takes an unexpected turn. And Mack finally finds a use for his 'Bits and Bobs' jar.