0:00:11 > 0:00:15Hello, I'm Hayley and welcome to a sporty Newsround.
0:00:15 > 0:00:18Today is Sport Relief and lots of you are getting your kit
0:00:18 > 0:00:20on to get involved.
0:00:20 > 0:00:23You may remember that Blue Peter took their Sport Relief challenge
0:00:23 > 0:00:26to the extreme when Lindsey Russell took on a never before attempted
0:00:26 > 0:00:27challenge to zorb across the Irish Sea.
0:00:30 > 0:00:34Ayshah went to find out how she got on.
0:00:37 > 0:00:40Lindsey, or should I call you Wave Runner?
0:00:40 > 0:00:42Absolute star.
0:00:42 > 0:00:44I'm so proud but gutted at the same time.
0:00:44 > 0:00:46Tell me all about the challenge.
0:00:46 > 0:00:51It was tough, it was a really long day, basically.
0:00:51 > 0:00:56I started at five in the morning and I was in the wave runner ball,
0:00:56 > 0:01:01zorb, for just shy of ten hours.
0:01:01 > 0:01:04In the end, we covered 17 nautical miles.
0:01:04 > 0:01:07The aim was 21, but sadly the weather got in the way
0:01:07 > 0:01:08a little bit.
0:01:08 > 0:01:10What parts of your body hurt after that?
0:01:10 > 0:01:12Everywhere!
0:01:12 > 0:01:15I think it would be quicker to tell you the parts of the body
0:01:15 > 0:01:16that I didn't use.
0:01:16 > 0:01:17You just use everything.
0:01:17 > 0:01:21The bit that I didn't see coming that was going to hurt so much
0:01:21 > 0:01:22was my hands and my wrists.
0:01:22 > 0:01:25Obviously you go to the gym and you work on your arms,
0:01:25 > 0:01:27you work on your legs and your core strength,
0:01:27 > 0:01:31but no one actually tells you to go to the gym and work on your fingers
0:01:31 > 0:01:33and your wrists because that's not a normal thing.
0:01:33 > 0:01:36You had a lot of highs and a lot of lows, didn't you?
0:01:36 > 0:01:38What about the highest points?
0:01:38 > 0:01:40I think setting off from Donaghadee was a really, really nice moment.
0:01:40 > 0:01:44We got there at 4am and people actually showed up.
0:01:44 > 0:01:46For me, that was really moving.
0:01:46 > 0:01:50My final high was getting into the harbour at Portpatrick.
0:01:50 > 0:01:53Just to see my dad on the finish line and to see all of
0:01:53 > 0:01:54Portpatrick school there.
0:01:54 > 0:01:55What was the reception?
0:01:55 > 0:01:58It was amazing!
0:01:58 > 0:02:01We had school kids there, my family, there were banners saying
0:02:01 > 0:02:06"Blue Peter rocks" and "Yeah, Sport Relief."
0:02:06 > 0:02:08Is there anything you're going to miss about the zorb?
0:02:08 > 0:02:09No.
0:02:09 > 0:02:10Nothing at all?
0:02:10 > 0:02:11No.
0:02:11 > 0:02:13Glad to see the back of it.
0:02:13 > 0:02:16What would you say to kids who have watched what you've done
0:02:16 > 0:02:17and possibly want to get involved?
0:02:17 > 0:02:19What would you say to them?
0:02:19 > 0:02:22The point is to know that you don't have to get a ball and run
0:02:22 > 0:02:23across the Irish Sea.
0:02:23 > 0:02:24You really don't.
0:02:24 > 0:02:27It can be something as small as going for a walk,
0:02:27 > 0:02:28a run, a swim, a cycle.
0:02:28 > 0:02:31It doesn't matter what it is, but just do something.
0:02:31 > 0:02:39Take part, raise some money for Sport Relief and get involved.
0:02:39 > 0:02:42You've been getting in touch to let us know what you're doing to support
0:02:42 > 0:02:44Sport Relief.
0:02:44 > 0:02:48Ellie in Dudley is running two miles while wearing her pyjamas!
0:02:48 > 0:02:51Mahek's been in touch to tell us about his PE teachers' football
0:02:51 > 0:02:57marathon - they're playing from sunrise til sunset.
0:02:57 > 0:02:59And Jake in London is doing a danceathon.
0:02:59 > 0:03:00Sounds like fun!
0:03:00 > 0:03:02Thanks for all your comments.
0:03:02 > 0:03:04Keep them coming!
0:03:06 > 0:03:10Next, engines at the ready - the new Formula 1 season revs back
0:03:10 > 0:03:13up again this weekend in Melbourne, Australia.
0:03:13 > 0:03:15Britain's Lewis Hamilton is looking to become
0:03:15 > 0:03:17a four-time world champion.
0:03:17 > 0:03:18But that's not all.
0:03:18 > 0:03:21There's a new track, a totally new team and some fresh
0:03:21 > 0:03:22faces on the grid.
0:03:22 > 0:03:25Ricky's been looking ahead.
0:03:26 > 0:03:28I'm very, very excited, looking forward to getting back
0:03:28 > 0:03:30in and the challenges that I'm going to face this year
0:03:30 > 0:03:32are all unknown.
0:03:32 > 0:03:33I know that it's going to be difficult.
0:03:33 > 0:03:35It will be a tough challenge.
0:03:35 > 0:03:37But it will be a great battle.
0:03:37 > 0:03:41Formula 1 begins a new season with 21 races -
0:03:41 > 0:03:45a record number - and a first Grand Prix in Azerbaijan.
0:03:45 > 0:03:48Three new drivers are set to make their debuts, too.
0:03:48 > 0:03:51German driver Pascal Wehrlein and team-mate Rio Haryanto,
0:03:51 > 0:03:54who will become the first Indonesian to start a Grand Prix,
0:03:54 > 0:03:58will be revving up their engines aboard Manor.
0:03:58 > 0:04:00There's a new Brit to join the ranks of rookies, too.
0:04:00 > 0:04:02Jolyon Palmer joins Renault.
0:04:02 > 0:04:05He's already been on Newsround telling us all about it.
0:04:05 > 0:04:06Very excited.
0:04:06 > 0:04:09It feels like it's a long time coming to be in this position
0:04:09 > 0:04:12and a dream come true so I can't wait to get started.
0:04:12 > 0:04:14Although Mercedes may still be the team to beat,
0:04:14 > 0:04:17one team smelling the fresh scent of burning rubber will be US-owned
0:04:17 > 0:04:21Haas, with Frenchman Romain Grosjean and Mexico's Esteban Gutierrez
0:04:21 > 0:04:26in the driving seats of the new team on the grid.
0:04:26 > 0:04:29Ferrari's new car has been fast in testing so far.
0:04:29 > 0:04:32Qualifying this weekend will tell us if the Prancing Horse can match
0:04:32 > 0:04:35the might of the Mercedes engine.
0:04:35 > 0:04:37In the hope of making the sport more exciting,
0:04:37 > 0:04:40F1 bosses have decided to introduce a new elimination-style qualifying
0:04:40 > 0:04:41system.
0:04:41 > 0:04:45The new system will see drivers knocked out every 90 seconds
0:04:45 > 0:04:49in the closing minutes of each of the three qualifying sessions.
0:04:49 > 0:04:51So who's going to win it?
0:04:51 > 0:04:54Here's what the BBC F1 team predict.
0:04:54 > 0:04:57Lewis Hamilton is going to win the 2016 F1 drivers' title.
0:04:57 > 0:04:59Lewis Hamilton will win the Drivers' Championship.
0:04:59 > 0:05:01Lewis Hamilton will win the World Championship again.
0:05:01 > 0:05:05I just think he's slightly too good for Nico Rosberg in that car.
0:05:05 > 0:05:06It will be tougher for him this year.
0:05:06 > 0:05:09I think his main challenge will come from Sebastian Vettel
0:05:09 > 0:05:10in the Ferrari.
0:05:10 > 0:05:13I think Nico Rosberg's going to win the drivers' title this year.
0:05:13 > 0:05:16He was on a roll at the end of 2015, winning the last three races,
0:05:16 > 0:05:19the last six pole positions, and everything we've seen in winter
0:05:19 > 0:05:22testing so far suggests that he really is getting on well
0:05:22 > 0:05:26with the latest Mercedes.
0:05:26 > 0:05:27Next to France for a sporting challenge with a difference.
0:05:32 > 0:05:34Finally, after all that sporting effort, how about a sweet treat?
0:05:34 > 0:05:37A chocolate maker in Croatia has created an eco-friendly chocolate.
0:05:37 > 0:05:40Using old-fashioned techniques, ecologically-certified cocoa beans
0:05:40 > 0:05:43and special equipment he's invented himself,
0:05:43 > 0:05:47Marinko Biskic's eco-treat takes 50 hours to make.
0:05:47 > 0:05:52He says the delicate process can even be affected by the weather.
0:05:52 > 0:05:57That's all from me - Newsround's back at 4.20pm.