Extend your marble-run adventures with a Loop Expansion Pack designed to add a thrilling loop stunt to compatible track systems. This expansion enhances hands-on play and experimentation, letting kids (and grown-ups) test speed, momentum, and creative layouts while expanding existing marble-run setups. Compact and easy to incorporate, the Loop Expansion Pack is an add-on that brings action and new stunt possibilities to your track build — ideal for encouraging problem-solving, trial-and-error learning, and extended play sessions.