 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is electro-heological fluids. Easy for you to say. As always, adult supervision is required. What you need for this experiment is cornstarch, vegetable oil, measuring cup, a balloon, and plastic cup. To set up this experiment, you're going to take a cornstarch and you're going to put a quarter cup of cornstarch and you're going to put it into the plastic cup. And that is about 60 milliliters. So you go ahead and put that into the cup and try not to make a mess. And then you're going to take your vegetable oil and do the same thing. You're going to do a quarter cup of the vegetable oil. So go ahead and pour that in 60 milliliters. And once we get that, then we're going to combine them in the same cup. Put them into the plastic cup and stir them until they become a liquid. You want to completely make sure that the oil and the cornstarch aren't lumpy. You want it to be like a liquid there. So it's pretty much a liquid. A little bit on the tip of the spoon, which I'll get rid of. I'll just wipe off there. It's not going to come off the spoon. But you just want that drippy liquid there. Then blow up your balloon and electrically charge it by rubbing it on your hair or your brother's hair, your sister's hair. Get that balloon charged up. And then what you're going to do from there is take one cup and then a plastic cup and pour the fluid into the other cup. And then bring that charged balloon that is close to the fluid as it's coming down. And you can see that it's attracted to the balloon, which is kind of crazy. So as you're pouring, it's going to want to pull over until the charge is done. So it's pretty cool the closer you get it, once it's attached to the balloon. And I will continue to do this, but I'll explain the science behind it. So the science behind this is when you mix the cornstarch and the oil together, you create a smart material called electro-heal-logical-fluid, or liquid. And that is the liquid that gets thicker as it presents an electrical field. So it's running and it's going down as you see, but when you create that electrical field called static electricity, which we all know by rubbing the balloon on your hair, it gets that static electricity, which makes the fluid more thicker. Cornstarch and oil do not conduct electricity. However, cornstarch is dielectric. That is when it's placed in an electric field, the molecules in it become charged. This makes them stick together. In this experiment, the cornstarch molecules stuck together and prevented both themselves and the oil molecules from flowing across each other, making the liquid thicker. I just kept doing this. I kept getting fascinated on how it would just pour out like a regular liquid. And then as soon as you got closer to that electrical field, it would just start getting really thick and pull right back up, which was truly amazing. And so I hope you guys try this at home. It is a lot of fun. It does help having that black background, as you can see it a lot easier. There's that one. There's a couple going at the same time. And look at also when it tracks to the balloon and enough of it gets stuck on the balloon or the cup right there. You can see it starts to want to pull up off the cup too, which is pretty cool. Electroheological fluids are known, sometimes known as the smart fluids. I hope you enjoyed this video. Remember to click thumbs up or share it. And thanks for watching.