Penguin Elf-Fushenzi

https://www.youtube.com/watch?v=IG7Nh07jGYI Mr. Sai works again! Using internal force to control the jellyfish spirit Cartesian Diver, it floated, floated and rotated in the bottle, and even performed an underwater ballet. Science toys for adults are full of mysteries~ By demonstrating the effects of Archimedes' principle and the ideal gas law, it becomes a fun classic game! After you become proficient in the operation method, you can team up with your friends or family to compete with music or passwords to see who can control the jellyfish elf best. Hurry up and compete! [Principles of scientific knowledge] Squeeze the plastic bottle containing the cartesian diver with your hands to increase the water pressure in the bottle, causing the gas volume in the cartesian diver to decrease, thereby reducing the buoyancy value of the water for the cartesian diver. When the cartesian diver When the weight of the diver is greater than the buoyancy force, it begins to sink. After the bottle is released, the water pressure in the bottle decreases. The expansion of the gas volume causes the buoyancy force to increase, and the cartesian diver floats up. (Source: Wikipedia) When the jellyfish elf sinks to the bottom of the bottle and no longer floats, take the jellyfish elf out of the bottle. If you look at the jellyfish elf, you will find two small holes on its body. Blow into one of the holes (be careful not to block the other one). hole) At this time, the water will be discharged from another small hole. Product specifications: ► Product specifications and dimensions: φ1.8 x 5 cm (including antennae) ► Material: plastic ► Manufacturing place: Mainland China ► Contents: Penguin Elf*1 (transparent bottle needs to be brought by yourself) Precautions : ► Please be careful of children swallowing small objects ► This product is suitable for children over 5 years old ► Colors are shipped randomly