In this box, your child will have more than 130 interchangeable parts such as rotors, wings or transmission modules. He will thus be able to build a helicopter and a hovercraft by understanding how they work.   The numerous components will allow your child to faithfully reproduce these flying machines. Propellers, blades, wheels and motors will no longer hold any secrets for him! This mechanical construction game is ideal for discovering the basics of engineering.   In addition, the playful aspect of the assembly really appeals to young people. They love creating machines with their hands. The pieces fit together easily to build the models. The child is proud to show off his creations once completed.