WHAT IS THIS? A science & technology kit to learn how to be a professional locksmith,WHAT WILL I MAKE? Build a giant visible padlock,WHAT WILL I LEARN? The visible pin tumbler shows how a key opens a lock,WHO IS THIS SUITABLE FOR? Ideal for children who are 5 years+ with a keen interest in STEM,WHAT'S IN THE BOX? Contains everything you need to complete the project apart from a small crosshead screwdriver