After completing these 28 models the builder can use the nuts bolts and other versatile parts to create many more models and projects This modern mechanix set is the perfect introduction of engineering to children The models and parts are designed to making the building process easy and a great way to encourage a child into the new experience of creation he manual starts with basic models first and as the skill of the builder increases complexity of models also increases which make it perfect for the first time builder Size Name: Standard; Age Range Description: Kid