This round we asked: What is your favourite magic trick?

Rachel Ng, 14, West Island School

The old-school "vanishing coin" trick has to be my all-time favourite. It's quick and easy, and the only one I managed to master during my fascination with magic and illusions as a kid. You simply place a glass bowl - covered by a handkerchief - over a coin. Then you wave your hand for effect, and when you lift the handkerchief off, the coin would have vanished into thin air - or has it?

Natalie Fung Chi-ying, 14, St Paul's Co-educational College

Changing clothes in a flash. Entertaining and intriguing, it features magicians altering their attire, from their costumes, to shoes and even hairstyle, in the blink of an eye. On top of that, it's a quick way for women to change away from prying eyes. It's also a very useful trick for teenagers like me to learn, since we can then dress up instantly without our mums having to shout "hurry up" non-stop.

Alex Chan, 16, La Salle College

Well, this one is easy. The "making a coin disappear" is the best trick in the book, and also a personal favourite. The idea behind this trick is simple, so we can pick it up quite easily and use it to impress our friends, or of course, the person we like or our special someone, and make them laugh.

Joseph Ho , 16, Wah Yan College

It's definitely the "Coke Splash" I watched at school in Form One. A boy who was performing a magic show invited a grumpy teacher to be his guest. He filled up a cupful of Coke and put it right on top of her head. We were very excited, hoping to see the teacher being soaked. However, we were all actually relieved to see the Coke vanish eventually.

Nicholas Chu Weng-lam, 16, Sing Yin Secondary School

Let me tell you about this "perfect" illusion. First, a beautiful assistant brings a guillotine onto the stage, and then she lies beneath it. The magician activates the machine and ... chop! Blimey, the razor-sharp blade goes through her neck and she is bleeding a lot! But wait ... as soon as the magician removes the blade, the assistant stands up in one perfect piece. Thrilling, isn't it?

Elsie Chau Yuen-shan, 16, Po Leung Kuk Mrs Ma Kam Ming Cheung Fook Sien College

It's the thrilling stage magic called "Sawing a woman in two". You can just enjoy this classic trick because there is no language barrier. When the magician is sawing the assistant, the audience is frightened because she is getting closer to "death". I love every minute of that act.

Thomas Lee Ka-chun, 16, Sing Yin Secondary School

Among many eye-catching magic tricks, my favourite one is the linking of rings. I once saw a magician do this incredible trick up close using five separate rings. With a casual wave of his hands, he made the rings link together! To me, it was a miracle, but to the magician, it was a piece of cake. It was a simple yet fascinating trick.

Rajinder Pal, 15, Delia Memorial School (Hip Wo)

I love all kinds of magic tricks, from card tricks to stage magic. Of all the illusions, "walking on the water" still fascinates me. This magic trick was performed by my all-time favourite magician, Criss Angel. He walks on the water in a swimming pool without a drop on his body. Amazing, isn't it?

Siu Yau-king, 15, Chinese International School

I truly enjoy watching quick-change artists. If you have watched America's Got Talent, you probably know what I'm talking about. It never ceases to amaze me when a magician sprinkles confetti over his partner, and "Bibbidi-Bobbidi-Boo", she steps out in a stunning ball gown. I wonder how they manage to change their dress in a millisecond. I guess they must have learned the trick from Cinderella's fairy godmother.

Vivian Li Wan-yi, 16, Wa Ying College

I'll never forget the magic trick my uncle showed me when I was just three years old - he seemingly detached his thumb from his hand. I remember I actually cried out when I saw it because I was scared that my uncle's thumb was really gone. Although that wasn't a really special magic trick, it's the most fabulous illusion in my memory.