(2015) Conveniently compact for travelling, this book is perfect for clever kids who love to truly test their brain power. The book has over 600 questions to keep even the cleverest of kids entertained, from science and nature to history and geography. Jam-packed with 10 different kinds of quiz such as ‘true or false’ and multiple choice to keep kids on their toes, it’s impossible to get bored of these brain busters. There are three difficulty levels so kids can either work their way to the top or give themselves the ultimate challenge!