Today Geraldine's happy pants are a happy blue - the kind of blue that reminds her of warm sunny mornings, and clean fresh air. Jo's happy pants are also blue, the kind of blue that reminds her of how it feels to paddle in a stream: cool, but not cold, and fresh on her skin.

This week's episode is all about smiling. What makes you smile? When grandma sits down on the chair where you put your painting to dry? Or perhaps when Dad treads in dog poo? You can't always be smiling - so the Happy Pants team explore other feelings you might have, too.

You'll also hear some happy tunes, fun facts, and a reading of Nadia L. King's book The Lost Smile. You can find out more about Nadia and her books on her website.

Send us some happy mail! We love hearing from you. You can email us at radio@visionaustralia.org.