Sorry guys.....,my mystake for not putting more info about the mechanics of the trick. Here some key points:
_ I believe it does not use the pressure principle because the mermaid is on a base and the top of the cylinder is not flexible.
_ A black tube goes up and down in the interior of the cylinder hidding or showing the mermaid.
_ The upper part of the base separates and is kind of a magnetic ring.....but I don't know what to do with it. I believe in some way it activate the black cylinder (hidden in the photos).
Here are some clues from and eBay seller that recently sold one:
"I recall there was something about turning the ring to make the magnet work . I'm pretty sure the liquid has metallic qualities, and it works on changing the magnetic poles".
Well not sure abot the metallic qualities of the water but I will try turning the ring and putting some water on the tube....I just realice that ....mine has no water and I never realice that it should have water
He also resommended me to contact the purchaser to get the instructions:
n***d ( 276) ........does anybody know how to contact a purchaser from eBay?