Geraldine and Kate have in their happy pants pockets a kazoo, a guitar pick, a harmonica... They must be ready for this week's episode which is all about MUSIC! Get ready to hear about all sorts of things with strings and other interesting instruments. From instruments small enough to fit in your happy pants pockets to ones big enough to fill a room, this week we'll be discovering all sorts of instruments and how they are used around the world and throughout history.