This is an easy to make hot air balloon. Empty a tea bag and stand the absorbent paper bag like a cylinder in a ceramic plate. Now light the top of the cylinder. The burning tea bag will take off like a hot air balloon.
http://www.arvindguptatoys.com/toys/Flyingflame.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
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