"Get the hang of gravity with the awesome GraviTrax Starter Set from Ravensburger. Use the included tasks and blueprints to get to grips with the unique rods, levels and bases of the GraviTrax building system. The open-ended construction design, and over 100 components included in the Starter Set, means that your creativity for your own tracks is limitless! Will your gravity sphere reach the target? If they’re flying off the track or getting stuck, you’ll need to change things up. Collect extra packs and add-ons for never-ending GraviTrax fun. Gravity based construction and racing fun for 8 and over."
Ravensburger GraviTrax - Starter Set