Explore STEM concepts while building lever and pulley models! Using the materials included in this set, primary-school aged children will be engaged and energized as they further their knowledge and understanding of science, technology, engineering and maths concepts. The set includes 130+ parts for a single child or team of 2 children to build 3 unique lever or pulley models: a Balance, a Wheelbarrow and a Sailboat. Once built, a downloadable booklet guides students through 3 hands-on, inquiry-based experiments on each of the models. Students will learn about lever classes, pulley systems, resistance, effort, mechanical advantage and more! Build 3 working level & pulley models -balance, sailboat & wheelbarrow. Includes 139 pieces. Up to 3 children can work on 3 Experiments - 1 at a time. Experiment worksheets included for each model. For Ages 7+. The Experiment Guide is aligned to national STEM standards and is appropriate for Key Stage 2/3.