I am tired up with the stuff available through Google search. Those sites never turn out good and fascinating for me. They usually have lifting an egg or an ice and all those silly little experiments . i mean i want something of a better standard like last year my exhibit was Electromagnetic crane. the project should not be childish but should entertain the spectators as well as the judges.
Hope you might have understood what i want to tell you.
Verified answer
make a potato gun :)