Mini Unit Beams Bridges Builder Set 620 PiecesMini Unit Beams: Bridge Builder Set Build Multiple Bridges with 1 kit! Unit Bricks has stepped beyond blocks to equip children with the tools they need to build the world they want. The latest in dynamic modelling systems, our NEW Mini Unit Beams Bridge Builder set provides a rich and rewarding STEM environment. With no additional tools required, budding engineers are ready and able to create, develop, re work, and marvel at their creations. Image