 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is a Skittle Waterfall Rainbow. As always, adult supervision is required. What you need for this experiment is Skittles, a glue gun, a water bottle, a box cutter or scissors, a PVC pipe, and a tank of water. Setup will vary on parts and pieces you use depending on how big your tank is. So I'm going to have to cut my water bottle because my tank is not that big of a tank. So you kind of want to put the water bottle next to your tank so that the water bottle and the PVC pipe that goes on top of it is going to be completely submerged in water. So you know you can just start off with the exacto knife or box cutter and then cut it with the scissors afterwards. But the end of the result is you want this little station here that's going to hold your pipe to be even. So you don't want it angled in any way. So you might have to recut it to make sure it's set like that. Just like there. You see mine's off a little bit. I'm going to trim it up. Then you're going to take your Skittles and I'm just using a hot glue gun. So be careful here. A couple different ways you can do it. You can put the glue in the back of each Skittle or like I'm doing here, just making four dots or five depending on how big your pipe is and then just placing your Skittles directly down the line. Now you could mix the colors but since I'm doing a rainbow experiment, I want the same color to flow down the rainbow. So here it is to save a little bit of time. I put them all on. It is a trick. If you don't put them too close together, it can't fall forward. So there it is and we're ready to do our experiment. This experiment I'm starting off with regular room temperature water. Take your Skittles and put it in the water and place it gently onto the cap or the control and you can see right away the water is starting to dissolve the Skittles and therefore kind of like what you did with the plate I did earlier, this effect is more falling to the ground, getting you, hence the name of the experiment, the Skittle Rainbow Waterfall. So here it is and it's pretty impressive and I'm going to tell you the science behind it. This experiment has three concepts. The first is solubility, the food coloring used to coat the surface of the candies in the water soluble. When placed in the water the coloring dissolves gradually, turning the clear water into the color water. Second is diffusion, the liquid molecules of small particles move randomly around bombarding one another resulting into a brown area movement. Over time this motion causes the color molecules to spread from the areas of the high concentration around the candies to the areas of the low concentrations, like towards the bottom of the tank. Sugar water is more dense than regular water. And the third concept is stratification. The physics concept is the hardest and in fact I'm still not quite sure if it's the right or the only explanation why the different colors are not mixed together during this experiment as you can see. When particles of different sizes are placed in a thin film of liquid medium the particles tend to stratify, configure themselves into different layers instead of mixing together. This should explain why the different colors did not blend together. So I decided to try this experiment one more time but instead of using room temperature water I used very hot tap water and as you can see that I did not balance the candy correctly and it wants to fall over so I'm gonna have to hold it this time. But you will notice that the food color and the coats of the candy is coming off very fast in the hot tap water and the particles are moving extremely faster to the bottom of the tank. But still the colors are still being separated out where they won't intermix where you can see the green in the background and then the red and then the yellow let me come up a little farther and they do not want to separate out which is really fascinating in the third concept that I talked about. I hope you enjoyed this video if you did remember to share and to click thumbs up and thanks for watching. Okay that video seems really interesting oh and um that video too um I think button down below and