In this set, students are introduced to the basic concept of magnetic polarities. Students then tailor the polarities to create controlled magnetic reactions and drive motion before progressively tackling more challenging tasks such as building and reinforcing a bridge span. STEM is woven into this stimulating and truly innovative set, which includes: 2 bilingual Mechanics card sets, 60 rods, 64 spheres, 4 indicator rods, 8 compass roses, 84 extra building accessories and a plastic storage case. Teacher's guide and student worksheets are downloadable after purchase.