a time machine to go into time and do better stuff
— pranav, Age 8
I would invent a machine that clears away pollution because pollution is bad and if there is more the artic will be hot not cold
— lovemeyou68, Age 10
i would build a a a bike that picks up trash.
— tifiany344, Age 8
I would build a solar device thats small but can power the whole wide world and give food to animals.
— mujtaba12345, Age 6
I would make a tree planting mashen
— kior25, Age 10
A device that can make trees live forever
— bondy2, Age 8
I would make an old time car that looks like it has hair but the "hair" is actually solar panels that power it.
— Jack3000204, Age 9
i would make a machine to attach to electrical devices so they run on any element.
— boxerweb, Age 8
my mach. will do every thing for human and run on solar power
— travis249, Age 8
The idea's name is Robot earth. It saves a bunch of energy. It also gives you water to drink. And also it proudly gave homeless people homes. It does everything. Hooray!
— dracutoria, Age 3