Inventions, science, ISEF, ideas?

A lot might have an idea about ISEF, a huge competition, a science inventing competition.. I need some ideas to begin an invention that was NEVER made before.. To receive the 10 points your ideas should be: 1- New!! never made before.. (I'll check whether your ideas were new or not online..) 2-... show more A lot might have an idea about ISEF, a huge competition, a science inventing competition..

I need some ideas to begin an invention that was NEVER made before..
To receive the 10 points your ideas should be:

1- New!! never made before.. (I'll check whether your ideas were new or not online..)

2- Implementable.. Something that could be actually done and figured out

3- Useful to the community, the environment, or whatever. Just useful.

4- Scientific, whether it uses physics and chemistry laws, but it has to be related to science

5- Understandable

6- (bonus.. to raise the probability of receiving 10 points) >>
Explanation: How could it be done? What information should I look for to help me do it? you know, like additional details..
Update: Please I need good implementable ideas!!

Not really about technology.. something about chemistry or physics or anythin BUT machines..
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