how to make a ferro fluid
This is a magnetic liquid that you can easily make at home.
To do this you need: Laser Jet Toner, rare earth magnet iron and some vegetable oil.
Now pour toner into the cup (50 ml)
And then put the 2 tbs vegetable oil into this cup as well and stir it together until you have a thin consistency.
Now, transfer to a smaller jar so you can handle it more easily.
Now test this fluid by taking out the earth magnet and putting it into the bottom of the jar.
Now, there will be needles popping up in the fluid where the magnet is located! Have fun!