0:00:00 > 0:00:00- *
0:00:01 > 0:00:03- Let's skidoodle, Ocidoodle!
0:00:03 > 0:00:05- # Blero goes to Ocido
0:00:05 > 0:00:07- # Find out what you want to know
0:00:07 > 0:00:09- # Find out what you want to know- - # Let's all go to Ocido
0:00:10 > 0:00:12- # Ocido, Ocido
0:00:12 > 0:00:13- # Blero goes to Ocido
0:00:14 > 0:00:15- # All the things you want to know
0:00:15 > 0:00:18- # All the things you want to know- - # Pop along and say hello
0:00:18 > 0:00:19- # Let's go see our friends
0:00:19 > 0:00:21- # Dylan
0:00:21 > 0:00:24- # Sian
0:00:24 > 0:00:26- # Sim, Sam, Swn
0:00:26 > 0:00:28- # Bala-bala-boom-boom
0:00:28 > 0:00:30- # Blero goes to Ocido
0:00:30 > 0:00:32- # Let's all go to Ocido
0:00:32 > 0:00:35- # Find out what we need to know
0:00:35 > 0:00:37- # Blero goes to Ocido! #
0:00:41 > 0:00:42- HORN BLOWS
0:00:44 > 0:00:47- Look what I've got. - It makes this amazing sound.
0:00:48 > 0:00:50- HORN BLOWS
0:00:50 > 0:00:52- Hee-hee-hee!
0:00:55 > 0:00:56- ECHO
0:00:57 > 0:00:58- Who was that?
0:00:58 > 0:00:59- ECHO
0:00:59 > 0:01:00- Where?
0:01:01 > 0:01:02- ECHO
0:01:02 > 0:01:07- If you won't tell me who you are, - I'm going to Ocido to find out.
0:01:07 > 0:01:10- When you need to know, go to Ocido.
0:01:22 > 0:01:24- Hello!
0:01:24 > 0:01:25- Hello.
0:01:26 > 0:01:28- Oh, no, he's followed me here.
0:01:32 > 0:01:33- Fooled you!
0:01:34 > 0:01:38- Yes, you did. I thought you were - the invisible person from my house.
0:01:38 > 0:01:41- Don't be silly. - People can't be invisible.
0:01:41 > 0:01:44- But I heard him. - He was copying what I said.
0:01:45 > 0:01:46- WATCH BEEPS
0:01:46 > 0:01:47- Hello.
0:01:47 > 0:01:49- Hello.- - Hello, Sian. We need your help.
0:01:49 > 0:01:53- We're hearing strange sounds - and can't find the source.
0:01:53 > 0:01:55- Maybe it's my invisible person.
0:01:56 > 0:01:58- We'll be right there, Sim.
0:01:58 > 0:02:00- Come on. Sim needs us.
0:02:05 > 0:02:07- Let's ski-doodle, Ocidoodle!
0:02:15 > 0:02:17- Where is it coming from?
0:02:19 > 0:02:22- I just can't identify it.
0:02:22 > 0:02:23- What is it, Sim?
0:02:23 > 0:02:24- What is it, Sim?- - We don't know.
0:02:24 > 0:02:28- We were on our way - back from the mountains...
0:02:28 > 0:02:30- ..when we heard a clicking sound.
0:02:31 > 0:02:35- We've tried everything, so we - thought you could help us look.
0:02:35 > 0:02:36- Over there.
0:02:42 > 0:02:43- What was that?
0:02:49 > 0:02:52- Oh, hello.
0:02:52 > 0:02:53- Oh, hello.
0:02:55 > 0:02:56- Where did you come from?
0:02:56 > 0:02:59- Where did you come from?- - It must have been through there.
0:03:01 > 0:03:02- Whoa!
0:03:03 > 0:03:05- Oops.
0:03:06 > 0:03:08- Hello, little bat.
0:03:08 > 0:03:12- Oh, so that's what was making - the clicking sound.
0:03:12 > 0:03:17- A bat, my favourite mammal. - Well done, you three.
0:03:19 > 0:03:23- A-ha, yes, just as I thought. - It's an Ocido long-eared bat.
0:03:24 > 0:03:29- A young one, I'd say, and it lives - in caves in the Ocido mountains.
0:03:29 > 0:03:33- Where we've just come back from. - How did it get in?
0:03:33 > 0:03:35- Someone left a window open.
0:03:35 > 0:03:36- Someone left a window open.- - Sim?
0:03:37 > 0:03:37- Oops.
0:03:37 > 0:03:39- Oops.- - It can't live here.
0:03:39 > 0:03:41- It needs to be with its friends.
0:03:41 > 0:03:43- We'll have to take it home again.
0:03:43 > 0:03:46- We'll have to take it home again.- - We're going to the mountains.
0:03:46 > 0:03:50- Great socks! Did you hear that, bat? - We're taking you home.
0:03:54 > 0:03:56- I thought it was my turn to drive.
0:03:56 > 0:03:59- It's your turn - to press the booster button.
0:03:59 > 0:04:01- Anybody can press a button.
0:04:02 > 0:04:06- I always press the booster button.
0:04:10 > 0:04:14- You can come down now, little bat. - We won't hurt you.
0:04:14 > 0:04:15- Are you thirsty?
0:04:20 > 0:04:23- Here you go, batty-bat.
0:04:23 > 0:04:27- I don't think bats - drink from bottles.
0:04:27 > 0:04:30- I can find out how bats drink.
0:04:30 > 0:04:40- Look. Is that how you drink? - From a lake or a river?
0:04:42 > 0:04:45- I'll ask Sam - if she can find one for you.
0:04:54 > 0:04:59- Oh, it's dark. - How's the bat going to find its way?
0:05:02 > 0:05:05- Bats are used to the dark.
0:05:06 > 0:05:09- They're awake at night - rather than the daytime.
0:05:09 > 0:05:12- They use sound to find - their way around and to find food.
0:05:13 > 0:05:17- Bat's still making that clicking - noise. Why does it do that?
0:05:17 > 0:05:21- When bats click, they're sending out - tiny bits of sound...
0:05:21 > 0:05:23- ..called sound waves.
0:05:23 > 0:05:27- When those sound waves - hit something, they bounce back.
0:05:27 > 0:05:29- So, sound can bounce off things?
0:05:30 > 0:05:32- Precisely.
0:05:32 > 0:05:36- Sound bounces - and comes back just like a ball.
0:05:36 > 0:05:40- If it hits something and - you're the right distance away...
0:05:40 > 0:05:42- ..you hear it coming back.
0:05:42 > 0:05:45- That's called an echo - and now comes the clever bit.
0:05:45 > 0:05:48- The bat has very large ears.
0:05:48 > 0:05:52- A bat's ears can hear the echoes - much better than we can...
0:05:52 > 0:05:56- ..and its brain uses the echoes - to work out where things are.
0:05:57 > 0:05:59- Bats can tell the difference...
0:05:59 > 0:06:03- ..between the size and shape - and feel of things, even water...
0:06:03 > 0:06:06- ..because of the way - the sound waves bounce.
0:06:06 > 0:06:09- Whales and dolphins can do it too.
0:06:09 > 0:06:11- You do go on! Have you forgotten?
0:06:11 > 0:06:14- We've got a cave to find.
0:06:14 > 0:06:17- I believe it's my turn to drive.
0:06:17 > 0:06:19- We'll see.
0:06:26 > 0:06:30- What about those caves? - Are any of them your home?
0:06:32 > 0:06:35- I'm bouncing sound waves.
0:06:35 > 0:06:39- Beep, beep, beep, beep!
0:06:44 > 0:06:47- If you're not careful, - you're going to hit the...
0:06:47 > 0:06:49- Booster button!
0:06:50 > 0:06:53- Told you anyone can press a button.
0:06:58 > 0:06:59- Oh, sorry.
0:07:01 > 0:07:03- Is that where your cave is?
0:07:04 > 0:07:07- Wa-hey, we found the way.
0:07:07 > 0:07:09- Oci-tastic!
0:07:15 > 0:07:18- Careful!
0:07:23 > 0:07:24- Oh, we're there.
0:07:27 > 0:07:29- Let's Oci-go!
0:07:32 > 0:07:33- Wow!
0:07:36 > 0:07:39- Hey, little bat, where are you?
0:07:40 > 0:07:42- ECHO
0:07:44 > 0:07:45- Who's there?
0:07:45 > 0:07:47- ECHO
0:07:47 > 0:07:49- It followed us here.
0:07:49 > 0:07:50- Who did?
0:07:50 > 0:07:53- Who did?- - The invisible person in my garden.
0:07:53 > 0:07:54- He's in the cave.
0:07:55 > 0:07:58- Come on. It's time we found - this invisible person.
0:07:59 > 0:08:01- Hello!
0:08:01 > 0:08:03- ECHO
0:08:03 > 0:08:05- See?
0:08:05 > 0:08:06- See?- - Who is it?
0:08:07 > 0:08:08- ECHO
0:08:08 > 0:08:13- Did you hear that? - It said what I said.
0:08:13 > 0:08:14- I'm Dylan.
0:08:14 > 0:08:16- ECHO
0:08:16 > 0:08:20- I think that's my sound waves - bouncing back to me.
0:08:21 > 0:08:23- I think what you heard was an echo.
0:08:23 > 0:08:24- ECHO
0:08:25 > 0:08:27- Like the echoes the bat made.
0:08:28 > 0:08:31- Wow! Bala-bala-boom-boom!
0:08:31 > 0:08:33- ECHO
0:08:36 > 0:08:39- There you are, little bat.
0:08:41 > 0:08:45- You'd all better get back - to the cloud ship quickly.
0:08:45 > 0:08:46- We have a problem.
0:08:46 > 0:08:48- We'd better hurry.
0:08:51 > 0:08:53- What is it?
0:08:53 > 0:08:56- What is it?- - It's the Ocido sneaky furry fog.
0:08:56 > 0:08:58- It appears out of nowhere.
0:08:58 > 0:09:00- When you least expect it.
0:09:01 > 0:09:04- It's impossible to fly through. - We could be here for days.
0:09:05 > 0:09:08- For days? - But there aren't any socks here.
0:09:08 > 0:09:10- What will we eat?
0:09:11 > 0:09:15- Wait a minute. - Maybe the bat can help us.
0:09:15 > 0:09:16- How?
0:09:17 > 0:09:22- Oh, yes. It could use its echoes - to guide us through the cloud.
0:09:22 > 0:09:24- Could you do that, bat?
0:09:34 > 0:09:36- OK, let's go.
0:09:49 > 0:09:51- Go right, Sam. Steady.
0:09:52 > 0:09:53- Little bit more.
0:09:54 > 0:09:56- And keep it going.
0:09:57 > 0:09:59- Just a little bit more.
0:10:01 > 0:10:05- The bat got us through - Ocido's sneaky furry fog.
0:10:06 > 0:10:09- Hooray! Thank you, little bat.
0:10:12 > 0:10:16- Oh, wow. What an adventure.
0:10:16 > 0:10:18- Time for bed.
0:10:18 > 0:10:23- Oh, me too, but first - there's something I have to try out.
0:10:23 > 0:10:24- Bye.
0:10:24 > 0:10:25- Bye.- - Bye, Blero.
0:10:29 > 0:10:32- So, it wasn't an invisible person - after all.
0:10:32 > 0:10:35- Bala-bala-boom-boom!
0:10:35 > 0:10:37- Bala-bala-boom-boom!
0:10:38 > 0:10:40- It's my echo.
0:10:40 > 0:10:42- Bala-bala-boom-boom!
0:10:59 > 0:10:59- .