More than 100 fiendish puzzles divided into four sections: mental, word, number and memory challenges. Each brainteaser has a time limit, usually between 30 seconds and three minutes – at the end of every challenge, the child ticks a “You did it!” box or a “Not this time” box. Answers are at the end of the book, along with a scoring table that allows readers to chart their growing brainpower or compete against their friends!