In my opinion,
-a time travel machine
-a mind reading iPod
-a machine to preditect the probability of chronic and dangerous diseases at the stage of foetus itself
-a machine that will calculate the butterfly effect of our present situation.
-something to kill the mosquitoes all together
-a sensor that detects when we are exposed to a harmful surroundings or bacteria
-a genetically modified microbe that feeds on cancer cells only

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yes ur r ri8 its tough to work on it & my teacher will think that m insane to presentt this ideas!!
yep,if these are to be presented u may hear what u told
but,the good news is that the last idea has become a reality
wow! that's gr8