This Mermaid Toy Has a Secret Science Trick!

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The Dive ’n Surprise toy uses clever physics to make Ariel magically pop out. As the weighted clam sinks, tiny holes let water slowly fill the shell. The deeper it goes, the higher the water pressure pushing in and compressing the trapped air. Once the force inside is strong enough, it overcomes the mechanical latch holding the clam shut, releasing Ariel. She spirals up to the surface because her asymmetrical shape and buoyancy cause uneven water flow, creating a twisting, graceful ascent. All of this happens without batteries.

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Date: September 24, 2025

20 thoughts on “This Mermaid Toy Has a Secret Science Trick!

  1. I had invented a little Titanic ship for my fish tank. You filled it up with fish food that looked like little people. It would float along until it hit the side of the tank, for instance, and when it did, the ship would break in half and all the little fish-food-people would spill out and the fish would be fed. I was a kid, and it was a fun project at the time. My friends liked it. I might still have it around somewhere.

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