Air Toobz Accessory & Expansion BundleAir Toobz Expansion Bundle Go Farther, Build Bigger, Experiment More An Easy Peasy Science bundle that expands your Air Toobz system with longer runs, new pathways, and interactive airflow accessories. The Air Toobz Expansion Bundle is designed to take your existing Air Toobz system to the next level. With additional tubes, long distance tubing, directional control, and interactive accessories, builders can create larger, more complex airflow systems