Play Bio Tecno JumboQuercetti Play Bio Tecno Jumbo Screws, nuts, washers, wheels and pillars, made of durable bio plastic material, can be mounted without special tools. All a child needs is a pair of hands and a lot of imagination! Thanks to the perforated base, the constructions can be realized horizontally or vertically. The Tecno Jumbo starter set stimulates coordination, logic and creativity, helping children to understand the basic principles of mechanics while