Jellyfish Elf-Floating and Sinking (Random Color)

https://www.youtube.com/watch?v=IG7Nh07jGYI Mr. Sai is working again! Use the internal force to manipulate the jellyfish elves cartesian diver to float in the bottle, and to jump a ballet in the water Adult science toys have mysteries everywhere ~ By demonstrating the role of Archimedes' principle and the ideal gas law, it turns into a fun classic game! After mastering the operation method, you can compete with your friends or family in groups, cooperate with music or passwords, and see who controls the jellyfish and elves the best. Come and play! [Principle of Scientific Knowledge] Squeeze the bottle of Cartesian diver with floats by hand to increase the water pressure in the bottle, causing the volume of gas in the floats of Cartesian diver to decrease. Therefore, the buoyancy value of water to the floats of Cartesian diver will be reduced. The diver's weight begins to sink when the weight is greater than the buoyancy. The water pressure in the bottle decreases after the Pote bottle is released by hand. The expansion of the gas volume causes the buoyancy to increase, and the floater cartesian diver rises. (Source Wikipedia) When the jellyfish elves sink to the bottom of the bottle and no longer float, remove the jellyfish elves from the bottle; if you look at the jellyfish elves, you will find that there are two small holes in the body, and blow into one of the holes (be careful not to block the other (Hole) At this point, water will drain from another small hole. Specifications: ► Product size: φ1.8 x 5 cm (including antenna) ► Material: Plastic ► Made in: Mainland China ► Contents: Jellyfish * 1 (transparent bottle must be prepared) Precautions: ► Be careful of small objects if swallowed by children ► This product is suitable for children over 5 years old ► Colors are shipped randomly