This is a fascinating bit of enchantment! Almost a throw away, but it can be cleverly adapted to
other routines, as a lead-in, to good effect. While some will be familiar with this from science
class, if presented seriously and concisely, the effect is startling and fun. I wouldn't carry on
too long with it, but then you won't need to; the magic works immediately. Less is more.
The props are adequate for the effect, and appear to be what you say they are--notebook coils.
You'll likely have fun with this yourself as it's rather whimsical. The price is right, and this
item could reasonably find its way into any kind of act at some point. And, after you've shown
them, you can stick them in your head and continue as the Martian Magician!