07/08/2016 Newsround

Good afternoon!

I'm Jenny, live with all the top stories this Sunday.

The Olympics have only just got underway and Great Britain

already has a new world record in the swimming pool.

But there's also been disappointment,

as some of Team GB's brightest medal hopes

failed in their bid for Olympic glory.

Here's Ricky's round-up of the action so far.

Hello from Rio, Ricky here.

Day one is done and it has certainly thrown

up a few surprises.

It's been really hot today here in the Olympic Park,

temperatures have reached more than 30 degrees.

It is so hot!

But that's enough about that, let's talk about the sport.

In the aquatic stadium, Adam Peaty,

who is only 21 years old, broke a world record.

Yep, he swam his heart out

in the men's 100 metres breaststroke.

He's now qualified for the final.

Tomorrow I'm hopefully going to move on a bit more.

I feel there is something more in the tank

but I want to save myself for that

and hopefully, you know, get that investment of all that work

I have done these past seven years.

So many people congratulating me there.

It is crazy and that is what it's all about, the Olympic experience.

Adam's roommate here in Rio, James Guy, didn't pick up

a medal in the 400 metres freestyle.

Hannah Miley missed out on a medal

in the women's individual 400 metres medley.

There was some disappointment for Team GB in the cycling

as Chris Froome, who only recently won the Tour de France,

was unable to pick up a medal here in Rio.

And in judo, Team GB's Ashley McKenzie fought back

the tears as he narrowly lost by a single point.

Now, what I love about the Olympics is that it always throws up

some amazing stories.

Vietnam have never won a gold medal before,

but that has all changed.

On Saturday, they won their first ever gold so imagine

how they are celebrating in Vietnam right now.

Plenty more drama to look forward to.

We've got fencing, hockey, and even more swimming

as the Olympics continue.

Brazil! Brazil! Brazil!

And we've been asking what you'll be watching -

Callum's looking forward to the sprinting.

Holly will be watching the high jump,

as it's her favourite sport -

she says she gets surprised how high the athletes can jump.

To world's longest aircraft now.

The mighty Airlander has been wheeled out of its hangar,

in preparation for its first ever flight,

following some tests to check everything is working OK.

Here's everything you need to know.

Part plane, part airship, part helicopter.

This is the world's longest flying machine.

It has a giant helium gas-filled balloon,

with a special shape to help it fly.

The team behind it boast it can stay in the air for three weeks

and it could potentially carry hundreds of people.

I want to get on this thing and fly pole to pole,

and we will fly over the Amazon at 20 feet.

We will fly over, you know, the world's greatest cities.

We'll show the whole world, live on the Internet,

exactly how beautiful this planet is.

They also say it could do a lot of practical good.

Its size and the fact it can land pretty much anywhere

means that it could be used to deliver vital aid

to areas hit by natural disasters.

Just how big is it?

It's 92 metres long -

that's almost 20 metres longer than the biggest airliner.

It's equal to nine double-decker buses lined up.

Its first flight date hasn't been announced yet, so watch this space.

Day trips to the museum are one of the most popular things to do

during the summer holidays, and it's usually free,

but now the famous Science Museum in London,

says it's planning to charge money to go to one of its exhibits.

Leah has this one.

It's free to come here to see most things.

But the Museum are giving

one of the most popular interactive exhibitions a makeover.

They say they will be charging people to come and visit it

when it opens in October.

National museums in England, Wales and Scotland are free to visit,

but they can still charge for some special displays.

What do kids here think about the new charge?

Because folk are on tight budgets,

they won't be able to experience everything.

They need the money to keep the museum going.

If it's really good, you feel good about it

and you feel like you paid good money.

If it's really bad, you feel like they've kind of ripped you off.

If they didn't, they wouldn't have enough money like they do now,

and they wouldn't be able to improve the museum.

I don't think that's very fair that some parents have to fork out,

and some parents can't.

The new exhibit, Wonderlab, is being built at the moment.

I spoke to Natalie, who's in charge of it.

Why did you feel you couldn't make an example and not charge families?

Why didn't you say, "Look, we've got this to show off,

it's great, and everyone can come"?

It costs a lot of money to run an interactive gallery like this,

and the money on the ticket charge will go to running that gallery.

Have you feel about those families that are saying,

"I can't afford it, simply"?

We will be having these initiatives

to get those families to come to this gallery,

if they find that ticket charge a barrier.

The new exhibition has cost the Science Museum

more than ?6 million to complete.

But, when it opens in just two months, it will be the visitors

who will judge whether it's worth paying for.

Next are you watching Robot Wars?

Newsround met the nine-year-old taking her fearsome machine,

called Glitterbomb, into battle.

It's on TV later today.

She told Ayshah why she thinks more girls should get involved.

Robots can let us do amazing things

that we wouldn't normally be able to do,

like go to Mars, go to see the Titanic,

and make little girls like me make big old men cry.

Brilliant!

Everyone thinks it's all about the boys,

but we need girls in this as well,

and girls need to bring lots of sparkle into this.

That's all from the team today,

but Newsround's back bright and early tomorrow morning at 7:40am.

Have a brilliant evening.