I want to invent an I-phone that runs on lemon batterys.
— helen123123, Age 7
I would build a time machine to go back in time to save the endangered or extinct species but not out of a delorian like in back to the future
— REDAWESOME, Age 9
A dumpster truck could take all of our trash and recycle it
— Emma Macom, Age 8
A Ufo that recycles trash, plastic, and newspaper! O_O
— Tigerlileie1, Age 8
I would build a machine that turned trash into feul for homes and cars!
— Matthew, Age 10
i would make a robot that cleans
— (none), Age 8
i would build a robot that runs on solar power that helps plant trees and build bicycles.
— maika, Age 7
i would make a machine that turns old things into a brand new and clean in a few hours
— julian8919, Age 10
a bot that plants trees!! it will be good.
— cheetah1165, Age 7
i am going to bild a mashen that clens the erth!
— jenna, Age 6