OLIA DESIGN OliaDesign Black Hawk Helicopter Toy 520 Pieces Building Blocks Set This is a very high quality set. It is 100% compatible with "Lego" Condition: 100% brand new with original box but comes with instructions Superb product for developing small motor skills with children over 5 years old Made of ABS - the same material used by "Lego". this material is safe and will keep its shape and Dimensions for years without Warping Has advance features that allow the parts to move right and left in addition to turning