3 years & up. Foster experimentation, problem solving, and other STEM-related concepts through captivating play with the Air Toobz Classroom Set. Using a child-safe turbine, Air Toobz send foam balls flying through a network of modular tubes and up into the air. The set offers continual opportunities for customization with adjustable airflows that create different speeds and interchangeable parts that you can arrange in many different ways. Create loops and swirls, or weave them under tables and over desks. What cool design can you come up with next?