As for the person who said the string was black, well, they clearly didn't read the instructions. The black string was to show you how the other strings were positioned on the plastic.
It's a fiver - you get what you pay for. It's good fun.
Recieved this as a gift, and it really isn't very good at all.
The string is completely black and visible, so the illusion doesn't even work unless you're basically doing it in the dark.
I wouldn't reccomend this to anyone.
The other review mentioned that it used string.
It was more like hair!
You are paying for some hair and some pieces of cardboard.
Looks good, but its not worth it!