Build an impressive main model of a double-blade helicopter and further options for building another 9 other models (10 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-precision wheels, mechanisms and snap-fit curved surfaces. The new inventor machine series has a thematic approach with multi model capabilities. Size H6.9, W31, D47cm. Batteries required: 3 x AAA (not included) plus . For ages 9 years and over. Manufacturer’ 1 year guarantee. EAN: 5291664009224. WARNING(S):Only for domestic use. To be used under the direct supervision of an adult.