Works with LeapReader and Tag reading systems. Help build a winning soap box car for your team with the LeapFrog® LeapReaderTM Book: Write it! Engineering a Win. Great for children aged four to eight years, this activity learning book is full of tasks and games that help build key writing and drawing skills.It includes an interactive workbook and a practice pack with 25 extra sheets of mess-free LeapFrog Learning Paper. Using their LeapReader, children can: Write numbers to balance equations, Learn engineering vocabulary, Identify mechanical parts, Solve mathematics problems to finish a maze, Connect the dots to draw a trophy and find out who wins the Soap Box Derby! Interactive audio support provides instant feedback as children work on their writing and drawing skills. As children explore LeapReader books, parents can connect LeapReader to their computer and expand the learning with fun, free activities, printables and tips from experts that reinforce theirschool skill set.The mess-free Learning Paper does not work with Tag.