Game of mechanical constructions with multiple assembly possibilities. We highlight the quality of the materials and the large guide files, which allow you to create different models step by step. It includes several formats of flexible platelets, pins, shafts, screws and nuts and various wheel sizes. The combination of all of them multiplies the possibilities of building pieces of varying complexity according with the wit. Recommended age 4-9 years.Special Shipping Information: This item ships separately from other items in your order. This item cannot ship to a P.O. Box. This item may be subject to additional processing days.