Check the listing for details. Dancing Ferrofluid Magnetic Ferrofluid Display in a Bottle Ferro Fluid CoolStuff. Color: Black, Condition: New. Listed at 23.69 USD. 【FerroFluid Display Toy Bottle】Ferrofluid is the astonishing liquid that becomes highly magnetized in the presence of a magnetic field.Place any magnet close to the magnificent space putty and take note of the putty’s instant gravitation and shape shift. 【Magnetic Liquid Desk Toy】You can make drops, pieces, spikes, and a little foot, by changing the moving speed, force, combination of the magnets. This ferrofluid in a bottle makes a great interactive display that will look awesome on your desk or coffee table. Everyone will enjoy playing with it. 【Ferrofluid in a Bottle- Stress-relief】The dynamic and mesmerizing nature of ferrofluid, combined with the tactile experience of manipulating magnets, can reduce stress and improve focus. It's a perfect gift for anyone with ADHD or focus challenges seeking relaxation through sensory stimulation. 【Ferrofluid Magnetic Liquid - STEM 】You can even make it dance.Use your imagination and imaginative magic.Each glass bottle contains 2 ounces suspension solution. 【Ferro Fluid's Age Range 】> 8 years old. NOTE: THE FERROFLUID CAN'T STAND LOW (BELOW 0 CELSIUS) AND HIGH TEMPERATURE (ABOVE 48 CELSIUS) OR IT WILL BE BROKEN EASILY. PLEASE TAKE A NOTE OF IT BEFORE PURCHASING.WE WON'T TAKE THIS RESPONSIBILITY IF YOU IGNORE IT.