Actually, it's very easy to make. If you have wanted to do something vaguely electronic, but the whole electronic thing frightens you, this is a good place to start. You will be building about the simplest circuit there is (a light, battery and switch), but the effect is incredible. This project provides a nice combination of craft and technical challenges with an equally interesting result.
If you thought the other wand was amazing wait till you have seen this, it'll blow you away.
For more great making and doing projects, free printables and templates of the highest quality please see my site dadcando.
And if you make one of these post up a picture of it, or better still email me and I'll put a picture of your wand up on dadcando.
Please Note: You should never point a bright light into someone's eyes. Apart from the fact that it is not very nice to be dazzled, bright LEDs and Bright UV LEDs can in certain circumstances cause damage to the retina (the back of the eye that does the seeing!) and the cornea (the bit the light goes through). When scavenging bits from another device, never increase the battery voltage or add other components designed to up-rate the output of LEDs or lights, unless you really know what you are doing, because you can easily break them, give your self a shock or create a fire hazard.
As Zootboy has pointed out, only use the batteries suggested in the instructable because they have the correct internal resistance. Using batteries with a lower internal resistance could cause the batteries to heat up or the LED to get hot and burn out.
However, this is not a problem at all if you use the batteries suggested.