We all love holidays, but sometimes it's hard to fill in the long weeks at home. How do you make marathon car trips fun? How can those bleak, rainy days be exciting? Here is the answer! Twelve-year-olds Anna and Tessa have created this invaluable list of inventions, missions, experiments, games and creations to get your ideas flowing. Build a volcano, invent a secret language, make a music video, act like a spy for the day and solve a family mystery! You'll never be bored again!