The 6th std from Udavi, Had couple of motors in their equipment stock. They were eager on biasing them. It started with removing the gear from the motor and setting a flan blade to it. The children noticed that wind was only produced in one direction when connected to terminals of a battery, it was either inward or outward. So by changing the polarity the direction of rotation also changed in the motor. Then came the idea of creating a bubble gadget( the 5th std students were playing with bubbles during the break, this gave the idea I presume) At first the students used two of the same kind of motors(same RPM) one for blowing air and the other for creating bubbles on a stick attached to a ring made by shaping copper wires into a circle and using glue gun to stick them on. This some how did not work as the both the motors were synchronized together. Then we got a 100RPM motor and used it as a substitute, this made possible of creating the bubbles 🙂 Then they cut wood to make a platform to fit the set up and nailed into a plywood and the setup looks like: