Jaiden would invent a new type of water which can dissolve pollution and never run out.
Asha would invent a watch that can teleport you wherever you need to go. That would fix traffic and pollution problems.that picks rubbish and then melts the rubbish so we can make new things.
Elsie would invent a machine that picks rubbish and then melts the rubbish so we can make new things.
Jack would invent a robot that makes dinner.