can anyone help me in getting any topic for science exhibition for grade 7th which we can use for getting the first prize don't give the common one please give some new and useful topics that everyone can use

can anyone help me in getting any topic for science exhibition for gra

1.	can anyone help me in getting any topic for science exhibition for grade 7th which we can use for getting the first prize don't give the common one please give some new and useful topics that everyone can use
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