Book fourteen in the Learn with Alex and Anna series. One warm and sunny day, just as the school summer holidays had started, Alex and Anna were allowed to invite some friends to a BBQ at their home. When Grandpa arrived, Alex and Anna learnt how he kept his heart healthy. Next while helping Auntie Lucy to clean and prepare the fresh fruit and vegetables, Alex and Anna were taught the difference between good and harmful bacteria. Later, after everyone had arrived, Alex and Anna were surprised to discover that one of their friend's only drinks cola drink, and others had never eaten healthy food. Some of Mummy and Daddy's friends then tell the children about the need to reduce sugar, and to drink and eat a mixture of foods which will provide all the vitamins and nutrients they need to keep healthy. Read this book to discover what Alex's and Anna, and their friends found out.