Ask a helper to come forward and, after the usual warm-up, hand him or her a magic wand (14" long, black with silver ends).
The magician has hardly turned away to look at the other children when the wand makes a loud, wailing-mooing noise, which is difficult to describe, but very easy to interpret: “Tell me, have you swallowed a cow or did you drink too much milk this morning?” Who is mooing?
The kids howl with laughter. The magician takes the wand, shakes it, turns it upside down – nothing happens. The kid takes the wand again and the magician looks away, the wand makes funny noises, which is very amusing.
This wand can also be used very effectively at Halloween parties. For example, the magician is scared and suspects that there is a ghost in the wand which groans.
If you're familiar with previous versions of this type of wand, you will have noticed the difference: The previous “wailing wand” simply started off as soon as it was turned upright. This newly developed wand is fully controllable. It makes noises when it should, but if you don’t want it to, nothing happens.
(Cards not included - shown for size comparison.)