The swirling Action & Reaction circuits are now enriched with amazing effects for creating a sensational effect! You can use the transparent tracks and glow-in-the-dark balls to create some amazing routes with fantastic special effects! Create thrilling routes with the suspended bridge, double up the circuits with branch-offs and race through spectacular swirls with the spiralling tracks! All the circuits can be customised also using household objects, allowing kids to unleash their imagination. The illustrated manual will guide children in creating circuits with growing levels of difficulty, offering plenty of ideas to complete the tracks and introducing them to physics.