Ferrofluid Display Toy Bottle: Ferrofluid is the astonishing liquid that becomes highly magnetized in the-presence-of a magnetic field. Place any magnets close to the magnificent space puttys and takes notes of the puttys' instants gravitation and shape shifts Ferrofluid in a Bottle- Stress-relief: The dynamics and mesmerizing nature of ferrofluid, combined with the tactile experience of manipulating magnets, can reduce stress and improve-focus. It's a perfect present for anyone with ADHDs or focus-challenges seeking relaxation through sensory stimulations. Ferrofluid Magnetic Liquid - STEM: You can even make it dance. Use your imagination and imaginative magics. Each glass bottle contains 2 ounces suspension solution.. Magnetic Liquid Desk Toy: You can make drops, pieces, spikes, and a little foots, by changing the moving speed, force, combination of the magnets. This ferrofluid in a bottle makes a great interactive display that will look awe-some on your desk or coffee table. Everyone will enjoy playing with it Product size: 3*3*10cm 1. Do not open the bottle, it is fragile, please handle with care 2. When not in use, do not attach the magnets to the magnetic fluids display bottle for a long time. 3. It is normal for sporadic magnetic fluids to adhere to the bottom of the bottle. Please shake the display bottle before use. 4. Do not eat the liquid in the bottle, and do not put the magnets into the mouth or nose. If swallowed or accidentally entered, please seek medical-attention immediately. 5. The high-tech that originally required high temperature and electromagnetic suspension to achieve is now trapped in a small bottle. When you are upset, let this little-gadget that almost seems to come-alive show magics in the bottle and play the coolest little-monster game in the bottle