Science is a wonderful, wonderful thing, and I don't think that people should think, oh only my teachers and my parents and scientists can do sciencec, I'm just a kid, I can't really do that. As air escapes from the balloon it is pushed through the holes you make in the bottle cap and the CD in all directions because of the shapes, smoothness and weight distribution of the hovercraft the escaping air creates a thin cushion between the CD and the surface. The cushion of air dramatically reduces the friction between the CD and the surface and allows your I didn't expect it to fly so high, I've gotta say that. But, it's just a little tweak, Trevor, that's all it takes sometimes, a little tweak. I like science because it's about food. You know what, you cook food, there is something scientific about it. I like reactions, and I like playing the kid.

Oh it's like being on Blue Peter, where's a dog? My cone's a bit too small, ah I'm gonna have re-cone. I'm re-coning. I always think, well I think that mum is very good at science, but maybe she'll make a couple of mistakes that will ruin the experiment. You have put a lot in there. Y--you expecting that to fly a lot higher than mine then? Is that what you're--, is that what you're--? When the parachute opens, the air resistance is now more than gravity. This slows down the parachute, and the person can land safely on the ground. Now, we're going to be making a marshmallow catapult. What we're going to be needing is five marshmallows. So, we can--

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Why does this happen, is you don't need to apply much pressure the first time you push the knife into the rice, as the grains sit loosely in the jar. I think, uh Cherry's going to be good at doing the experiments. We, we see quite a lot of that, uh quite often certain things going-- mishaps and going wrong. That doesn't make any sense to me, what you've just said, but I'll--I'll--, again, I'll take your word for it, mate. This is really good because we're actually doing it rather than watching it, you know. We're actually going to try and do these things. It will be very interesting.

Put your hovercraft on a flat service. Carefully let go of the balloons and give the CD a little push. The negative charge on the ballon or comb attracts a positive charge in the water so pulling the water closer. You fill the plastic bottle three quarters full with water and a few drops of INTERRUPTION washing-up liquid. Push the needle adaptor of the pump through the cork, it needs to go all the way through so you might have to trim the cork a little bit.Want to use this kit for a science fair project? See our experiment ideas below to get you started. Yes. Yeah. I think we'll make the bra--, the base out of these straws then, do we? Got a bit of tape here.

Now if you've got children in the house and you've tried to bake a cake recently. Have you done that? You go ahead. Here we go. Okay. Now, hopefully the bicarb will start to release very soon. Here we go. Whoa! LAUGHS So get a grown-up to heat up the milk in a pan or in the microwave. It should be hot but not boiling. Well, let's have a look. Let's...let me grab it. So what we're doing is we're applying a push force to the car. So the air rushes out of the balloon...I think mum, I'm sorry but I don't think you'll be as good at science because you just don't like mess. The Sputnik look? I'm going to put a nice bandage around. The thing is, I'm putting so much on mine that it's gonna be quite weighty isn't it? Oh no, no. This is a challenge Carol, I've got to try and beat you somehow. That's about enough, isn't it?

Lemon contains citric acid and it's when it's mixed with the bicarbonate of soda, it explodes. LAUGHS Is this actually gonna take off with vinegar and bicarbonate of soda? Surely, we've gotta get the right balance then. Why? The sciency bit. Spinning the bottle makes the water inside spin like a whirlpool. INTERRUPTION It makes a long, thing v-shape in the middle down into the cap. This is called... By the way we have not brought these in ourselves, I don't go around carrying little pictures of me self. A bicycle pump. I'm gonna add extra air inside the little thing and hope that it will increase the reaction. It could go terribly wrong.LAUGHS It's in the bag. Now one I have learnt is apparently the reaction is better when it's warm, so you don't want the vinegar to get too cold.