Crystal Tube

Three silks magically tie themselves together as they fly into the air!
Beautiful silk magic that's perfect for school assemblies, parties and services.
A baffling but very easy to do effect that's perfect for those new to magic. 
The Effect:
This smart-looking crystal tube is shown to the audience. It's crystal clear that it cannot conceal anything.  Three stage-size silk silks are pushed into the tube. A few magic moves of the hand and then you put your mouth to one end of the tube and BLOW! When they shoot out the other end they are knotted together.
Only three silks are used. Nothing concealed in the hands at any time. The trick is self-working, with a little help from the magician.