0:17:50 > 0:17:57.
0:18:02 > 0:18:05CBBC have sent these four magicians into your schools.
0:18:06 > 0:18:10They are some of the hottest magicians in the country.
0:18:10 > 0:18:12Our magicians went undercover
0:18:12 > 0:18:16and they pretended to be supply teachers.
0:18:21 > 0:18:25D'you think you'd be able to tell if your teacher started doing magic?
0:18:25 > 0:18:26Do you?
0:18:26 > 0:18:28This is John, he loves milk and
0:18:28 > 0:18:31he's a cool cat - in his own mind.
0:18:31 > 0:18:34He has magic skills and he is going to use them
0:18:34 > 0:18:36as an undercover supply teacher.
0:18:36 > 0:18:38The hidden cameras are set.
0:18:38 > 0:18:40Is it your school? Is it your class?
0:18:40 > 0:18:43My wife works in a zoo. It has some advantages.
0:18:43 > 0:18:47It means that when she comes home, she smells a bit.
0:18:47 > 0:18:51However, she gets to bring some of the smaller, friendlier animals home.
0:18:51 > 0:18:54I've brought one of these animals with me.
0:18:54 > 0:18:56Actually, when I say I've brought one,
0:18:56 > 0:18:58I've brought lots and lots of them.
0:18:58 > 0:19:01It is called the Peruvian almond fly.
0:19:01 > 0:19:02They are very small,
0:19:02 > 0:19:05in fact, they are so small they are invisible to the naked eye.
0:19:05 > 0:19:09They live in big groups in a swamp. I've brought some with me.
0:19:09 > 0:19:13This is just a small group. I thought I'd let you see them.
0:19:13 > 0:19:15Do you want to see them?
0:19:15 > 0:19:18They're nodding, they must believe he's a real teacher. Would you?
0:19:18 > 0:19:21Hopefully, we may be able to have a look at them. I've got them in this
0:19:21 > 0:19:26container here. Those are the Peruvian almond flies.
0:19:26 > 0:19:29'The insects don't really exist, do they, John?
0:19:29 > 0:19:32'It is all part of your trick. But it is a good one.'
0:19:32 > 0:19:34There are about 5,000 of them in there.
0:19:34 > 0:19:37It is possible to get these out but I have to keep control of them
0:19:37 > 0:19:39under this piece of cloth.
0:19:39 > 0:19:42Do you mind if I get them out and show you them? Is that all right?
0:19:42 > 0:19:44They're very well behaved.
0:19:44 > 0:19:47I need someone to come and hold the container for me.
0:19:47 > 0:19:51'There's no shortage of volunteers - he's got the class taken in.'
0:19:51 > 0:19:55You look like you'd be good, come out here. What is your name? Anya?
0:19:55 > 0:19:57'Anya doesn't know it yet, but she's about to become
0:19:57 > 0:19:59'a magician's assistant.'
0:19:59 > 0:20:02Can you feel the flies flying around there a little bit? Yes?
0:20:02 > 0:20:03You can feel them?
0:20:03 > 0:20:06'She thinks she can feel them, but she can't really, it is
0:20:06 > 0:20:08'part of the trick.'
0:20:08 > 0:20:09Can you see any of them? No?
0:20:09 > 0:20:12They're invisible to the naked eye.
0:20:12 > 0:20:14We can get them out and have a look, if I just open it.
0:20:14 > 0:20:17They shouldn't fly out, they should just stay on the leaves.
0:20:19 > 0:20:22If you listen carefully, you can sometimes hear them.
0:20:22 > 0:20:25They make a noise like the miaowing of a cat, except silent.
0:20:25 > 0:20:26'What?!'
0:20:26 > 0:20:32If I just put this cloth over here there like that.
0:20:32 > 0:20:35We should be able to wake them up and see if we can get them to come out.
0:20:35 > 0:20:37A little tap...
0:20:37 > 0:20:39HE KNOCKS
0:20:39 > 0:20:43Whoo! There they are. They are out now.
0:20:43 > 0:20:44Whoo!
0:20:44 > 0:20:49They're a little bit lively. They will calm down.
0:20:49 > 0:20:51OK. That is good.
0:20:51 > 0:20:55That's good, they're very calm, if they get ex... Whoa!
0:20:55 > 0:20:57They must be strong to shift John around.
0:20:57 > 0:21:00Except that is some amazing acting there, mate.
0:21:00 > 0:21:02Anya, if I just lift that up, can you see them?
0:21:04 > 0:21:08No, it is difficult to see them, isn't it? Whoa!
0:21:08 > 0:21:10They're quite... Wahay-hay!
0:21:11 > 0:21:13Oh, dear me. LAUGHTER
0:21:13 > 0:21:17Just pull them back now. I'll try and let you have a look.
0:21:17 > 0:21:20When they are in a big group like this, it is possible to see them.
0:21:20 > 0:21:24If I just lift that up, can you see them? Ah...
0:21:24 > 0:21:26- 'They've escaped!'- They've got out.
0:21:26 > 0:21:28'I bet the class feels itchy already.'
0:21:29 > 0:21:31Can anybody see them?
0:21:31 > 0:21:35No? OK. They're just above your head, keep still.
0:21:35 > 0:21:37They've moved.
0:21:37 > 0:21:41They are over there now. They have landed. Keep still. They're up again.
0:21:41 > 0:21:46They are here. No, they are not here either. Erm...
0:21:46 > 0:21:49Ha! I've got them! No, I haven't, erm...
0:21:51 > 0:21:53Oh! I see them, I see them now. There they are.
0:21:53 > 0:21:56They are a bit high, they're coming down.
0:21:56 > 0:21:59Coming down, here they are. They are there. Just there.
0:21:59 > 0:22:03I'm going to get them. Keep still. I'm going to get them.
0:22:03 > 0:22:06Perfect. There we are. We've got them.
0:22:06 > 0:22:09'He's convinced the class he has caught them, great skills.'
0:22:09 > 0:22:13Whoo! I will try and put them back in the box.
0:22:13 > 0:22:15I will try and put them back in the box.
0:22:15 > 0:22:18'The insects are not only invisible, they're not really there.
0:22:18 > 0:22:21'It's all been an amazing trick. Time for John to reveal his secret.'
0:22:21 > 0:22:23Close the box like that. Wonderful.
0:22:23 > 0:22:30We've got them. Now, I have got a little bit of a confession to make.
0:22:30 > 0:22:33Erm...my wife does not actually work in a zoo.
0:22:33 > 0:22:36Although sometimes when she comes home from work she does smell a bit.
0:22:36 > 0:22:39In fact, I'm not a real teacher, I am a magician.
0:22:39 > 0:22:43There are hidden cameras in the classroom filming you.
0:22:43 > 0:22:47We have one up there and we have another one in that box over there.
0:22:47 > 0:22:51There's another one in that box over here. You can give them all a wave.
0:22:52 > 0:22:54'They are loving it, look! He did it.'