Air Toobz Expansion PackAir Toobz Expansion Pack Extended Tube Building Set An add on set that expands your Air Toobz system with longer builds, more pathways, and even more airflow experiments. The Air Toobz Expansion Pack is designed to extend the fun and possibilities of your existing Air Toobz system. With additional tubes, connectors, and foam balls, kids can build longer pathways, more complex layouts, and more dynamic airflow circuits. As builds grow in size and