Rosie lives in a playhouse with her colourful group of friends. Together they embark on adventures as they learn the meaning of true friendship. Big Bear is worried. He's received an invitation to have tea with the Queen - he has been on plenty of picnics, but never tea. So in best Pygmalion style, Rosie and Raggles teach him 'going to tea' etiquette. Of course the invitation is a prank by Will so Rosie and Raggles invite a disappointed Big Bear to have tea with them, which he does in style.