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This Balloon Helicopter is perhaps the greatest flying object. This is a readymade toy. There are 3 blades, a rotor, a balloon and a socket. The air from the balloon comes out from a thin hole near the three wing tips. The exiting air spins the blades and the helicopter takes off whistling as it climbs up the air. When the balloon deflates it comes down. www.arvindguptatoys.com/toys/balloonhelicopter.html This work was supported by IUCAA and Tata Trust. This film was made by Ashok Rupner TATA Trust: Education is one of the key focus areas for Tata Trusts, aiming towards enabling access of quality education to the underprivileged population in India. To facilitate quality in teaching and learning of Science education through workshops, capacity building and resource creation, Tata Trusts have been supporting Muktangan Vigyan Shodhika (MVS), IUCAA's Children’s Science Centre, since inception. To know more about other initiatives of Tata Trusts, please visit www.tatatrusts.org