It's a beautiful sunny day and Tang has decided to play a really happy song for today's Big Zing. A sunny piece of music coming from the glade sounds perfect for his happy song - it's the happy, jazzy sound of the vibraphone. Tang can't wait to play his song to the others but each time he finds someone to play it too they need his help instead. Before he gets a chance to play though they either dash off, fall asleep or are just too hot to listen. The only person he finds to play his happy song to is Yapple - Drum's stuffed toy pineapple! As he sings his song he realizes that because of him the others have all had a happy day even though they haven't heard his song. Drum is happy because she got the banana she wanted, Todd is happy because he's learned a new way to get bananas out of the trees, Zak is happy because he got his bat and ball to work, the Beach Byrds are happy because they served him a drink, DJ Loose is happy because he was able to have a nap, Granite is happy because his new knotted handkerchief hat cooled him down, Mr Gravel is happy because Mr Granite is happy and Panzee is happy because she found her flowers. Tang realizes that it has been a very happy day even if he didn't sing his song to anyone. As he sings his happy song to Yapple the others creep into the Clubhouse and join in. They all love Tang's happy song and can't wait to sing it with him in the Big Zing.