How can a child explain hydroponics?

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I have all 12 plants rooted now. They -should- all grow. I’ll try to take pics of this thing every month to track the progress. I hope to have these things really growing by the end of spring so I can get a bunch more clippings.

I found the more narrow top fit much better into the bottom than the more common two-litre style bottle. I’m just a little nervous that using 1 litre instead of 2 might make it a little too cramped.

The next one I build is going to be the air pump ebb and flow kind from a two litre bottle.

Question by Michele: How can a child explain hydroponics?
My son in nine years old. He has to give a current events presentation, and he would like to talk about hydroponics. I understand the concept and find it exciting. However, how can he explain it for his classmates to understand and enjoy?

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