Plan Toys Marble Run (Deluxe) When kids put this beautifully colored Deluxe Marble Run together, they'll be delighted by the results when marbles spiral and roll from top to bottom Small bumps inside the track keep marbles from rolling so fast they fall off the track Deluxe Marble Run helps children 3 and over develop fine motor and social skills, while learning to problem-solve and having fun 30-piece set made with ecofriendly PlanWood marble run pieces and solid wooden poles in graduated lengths