Cut a hole in a balloon. Stretch the hole on the mouth of a plastic cut bottle 10-cm high. Fix a card reel in the mouth of the balloon. On blowing through the reel the bugle will make a trumpet like sound.
[ Ссылка ] 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
