Drop this 5cm Jellyfish into a PET bottle filled with water and sueeze the bottle to make him spin and go up and down. Also called a cartesian diver, this is a fun way to explore the relationship between pressure and buoyancy.
Please note: As this item is an assortment we cannot guarantee a specific style please let us choose on your behalf or state your preference in the comments section of your order. Each sold separately.


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