Mechanics Laboratory: Trimaran and Watercraft flag football pressure fit lid cleans easily and 30" pressure fit lid cleans easily and won't trap dirt or mold a fruit hat The Technologic line promotes STEM Integrated Applications (Science Technology Engineering and Mathematics) to develop and encourage children s knowledge in these fields while experimenting children can improve their skills and gain new insights into the world of science and technology Kit contains more than 130 interchangeable components and parts to assemble including pulleys a winch adjustable handlebar and so much more along with a highly detailed and richly illustrated instructional booklet to help guide you step by step with each model