This is a podcast from the children's radio station Fun Kids. Listen on DAB Digital Radio across the UK or online at funkidslive.com.

Right then, it's time for the only show in the whole world that lets you travel out of the world,

spins you around the universe and gets you back home in about half an hour.

It's the Fun Kids Science Weekly.

My name's Dan, thank you so much for giving us a listen and a download and a play and a stream.

This week we learn about the biggest, most brutal insect in Asia.

We'll also, in quite a niche move, talk to a frog expert all about why climate change is making amphibians ill. And I've got tons of

your questions to answer, absolutely tons of them. I'm loving the ones that you've sent to me.

So if you've fired over a review for the Fun Kids Science Weekly to Apple Podcasts in the last few

weeks, there's a good chance that I might say hello and answer one of your

questions. That's in a sec. First, let's catch up with one of our favorite geniuses here on

the show. This is Professor Hallex. Hallex's Hydration Help Desk. Call accepted. Hello, Professor.

If water's meant to be good for you, exactly how much water should I be drinking?

Oh, good question. Nanobot, can you help?

Well, a 10-year-old child needs around 2 litres of water every day to replenish what is lost

through micturition defecation, exhalation and perspiration.

Or to put it in much simpler terms, you need about one big bottles worth of water to replace what you lose by going to the loo, breathing out and sweating.

That's what I said!

Now all that water doesn't have to come from drinking. One quarter of that two litre target tends to come from food.

There's lots of foods which contain water,

from juicy fruits like watermelon that are over 90% made up of the stuff,

to foods like eggs, meat and cheese, which all contain some water.

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