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0:00:12 > 0:00:16- It's a special day - for the children of Cwm Teg school.
0:00:17 > 0:00:20- Anti Non is taking them for a walk - along the river.
0:00:21 > 0:00:24- The children enjoy going for a walk.
0:00:25 > 0:00:27- That salmon jumped high.
0:00:28 > 0:00:30- It's on its way up the river.
0:00:33 > 0:00:35- A huge leap means a huge splash!
0:00:35 > 0:00:37- Isn't that right, Dafydd?
0:00:41 > 0:00:44- Can Dafydd create a big splash - with this stone?
0:00:48 > 0:00:49- Oh, no! Where did it go?
0:00:54 > 0:00:57- The stone sank - to the bottom of the river.
0:00:58 > 0:01:00- Do you know why the stone sank?
0:01:03 > 0:01:06- Dafydd thinks - it wanted to join its friends.
0:01:11 > 0:01:13- You're a funny boy, Dafydd!
0:01:17 > 0:01:22- Heavy objects, like stones, - sink when you throw them in water.
0:01:22 > 0:01:27- Light objects, like leaves, - float on the surface of the water.
0:01:30 > 0:01:34- Can you see light things - and heavy things around the place?
0:01:37 > 0:01:39- What will float on water...
0:01:40 > 0:01:42- ..and what will sink?
0:01:47 > 0:01:50- Would a light flower - float on the water?
0:01:54 > 0:01:55- What about this twig?
0:01:58 > 0:02:01- Mali is sure the twig would float.
0:02:05 > 0:02:07- Yes, that's a very heavy rock.
0:02:09 > 0:02:14- I'm sure it would sink in water if - you could actually lift it, Dafydd!
0:02:18 > 0:02:21- What will sink and what will float?
0:02:21 > 0:02:24- Let's throw them in the water, - after three.
0:02:26 > 0:02:30- One, two, three!
0:02:30 > 0:02:32- Go!
0:02:34 > 0:02:38- The stone is heavy, so it sank - to the bottom of the river.
0:02:38 > 0:02:41- The twig floated, - so it must be light.
0:02:43 > 0:02:47- The flower and the leaf also float - on the surface of the water.
0:02:55 > 0:02:59- Dafydd has challenged Mai and Mali - to a race.
0:02:59 > 0:03:03- One, two, three!
0:03:04 > 0:03:05- Go!
0:03:07 > 0:03:09- The river flows - into Cwm Teg harbour.
0:03:11 > 0:03:14- Whose floating item - will get there first?
0:03:23 > 0:03:26- # Let's travel down the big river
0:03:26 > 0:03:29- # Oh, to the sea
0:03:30 > 0:03:33- # We'll row to the distant harbour
0:03:34 > 0:03:37- # In our little boats
0:03:37 > 0:03:40- # Oh, in our little boats
0:03:42 > 0:03:45- # Row them to the sea
0:03:45 > 0:03:47- # Oh, in our little boats
0:03:48 > 0:03:51- # Oh, row them to the sea
0:03:53 > 0:03:56- # Little boats and big ships
0:03:57 > 0:04:00- # Oh, to the sea
0:04:01 > 0:04:04- # Sail them on the blue waters
0:04:04 > 0:04:07- # Oh, our little boats
0:04:08 > 0:04:11- # Oh, our little boats
0:04:12 > 0:04:14- # Row them to the sea
0:04:15 > 0:04:18- # Oh, our little boats
0:04:19 > 0:04:22- # Oh, row them to the sea #
0:04:25 > 0:04:29- The race is over for Mai's flower - and for Mali's leaf.
0:04:30 > 0:04:32- Dafydd's twig is the winner.
0:04:34 > 0:04:36- Congratulations, Dafydd!
0:04:38 > 0:04:41- Mali is disappointed - she lost the race.
0:04:42 > 0:04:46- Never mind! - You can always have another race.
0:04:49 > 0:04:51- Bye-bye, from Cwm Teg.
0:04:55 > 0:04:55- .