The new INVENTOR MECHANICS series has a thematic approach with multi model capabilities, featuring an impressive main model of an excavator and the further options of building another 4 other models (5 models in total). A new library of patent-pending components has been added to the ENGINO system which enhances both aesthetics and technical features. Full printed instructions are included and there is also a free app to download with instructions and more. These parts include high-precession wheels, mechanisms and snap-fit curved surfaces. The smaller sets in the series are suitable for 9 year olds, while older children are challenged with the bigger sets which also include a geared motor. The top of range steps-up the complexity with Robotics technology, Bluetooth connectivity and software control. Suits ages 9 years +. Features: The new INVENTOR MECHANICS series has a thematic approach with multi model capabilities It features an impressive main model of an excavator and the further