The Inventor series has a thematic approach with multi model capabilities. With inventor Industrial you can build numerous diggers and dozers. By combining sets larger models can be created. Instructions on a number of builds are included in pack with free to download instructions available from the Engino Website. Snap fit system. Multiple builds possible. Online model plans. Fully compatable across all engino systems. Develops stem priciples. Size H19.5, W26, D5.5cm. For ages 3 years and over. Manufacturers 3 year guarantee. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. This product contains abs, tpe and nylon.