SmartMax: Build & Roll (Nordic)SmartMax: Build & Roll (Nordic) Build and roll with this magnetic construction set. Children can roll the balls down the tubes like a giant marble run! Magnetic construction where the building is just as fun as playing! Pieces click together with a magnetic snap, with just enough strength for toddlers. Use the plastic baseplate on the top of the box to create super stable ball runs. Create twists and turns and vertical drops to send the balls racing