 All right, welcome back to Kids Fun Science. Today's experiment is can you make a banana half brown? So halfway down, can you make that brown and the rest yellow? We know bananas are unripe when they're green. They're ripe when they're yellow and they're starting to spoil when they turn brown. So today's experiment is we're going to make the banana half brown and then we're gonna talk about the science behind it, why they turn brown. We'll do that right next. What you need for this experiment is a pot filled with water about two thirds of the way up, a skewer, some tongs, and a banana, a ripe banana that's yellow. So what you're gonna do is you're gonna fill your hot water up and you're gonna put it over on the, the, you're gonna put it up on the burner right there and you're gonna let it boil. So you're gonna turn it on high so it boils. Then we're gonna come back to the banana and we're gonna take the skewer and we wanna be able to make sure your skewer is long enough to fit inside the saucepan so it can hang over. And then we're gonna take it about two thirds of the way up about right here, go all the way through just like that. Make sure it's all the way over and then we're gonna stick it in the boiling water once it starts. And what we're gonna do is use the tongs for is when it's boiling, we're gonna wanna grab the banana here and set it into there and take it out. So now we're gonna put that banana in there for 30 seconds and then we're gonna remove it from the boiling water and for five minutes and we're gonna see if we can make that banana half brown. All right, so our water's boiling. We're gonna take our tongs in the banana and we're going to set it in here for 30 seconds. Make sure only one end, you might have to hold it with the tongs if it goes all the way over. But basically you wanna have it just so half of it or part of it is straight down where it's not moving. So this time I had to hold it to see if it's gonna turn brown from there. We're coming on about 15 seconds right now. We're gonna do this for 30, then we're gonna hold it out for five minutes to see if the banana can completely turn brown. We're coming up on the 30 seconds right here. Hold it out and you can definitely see there's a little bit of brown there so we'll see if it continues to get brown and we'll monitor it for back from there. So we've been out for about a minute now. You can see the banana definitely where it was on the water line right there is brown and you can definitely see there's a color change here. Is it completely half brown? I don't think so, but it's getting there. We're gonna let it go for a little longer and see what it turns out from there. So I kind of got an idea that the steam actually worked better than the actual putting the banana in the boiling. So we're gonna get back to the other banana from the first experiment. But what I'm doing here is just holding it with the tongs and spinning it around in a circle so the steam can cover all the peel all the way through. And like I said, I kind of stumbled over this that the steam actually works a lot better than dipping the banana into there. As you can see, look at that. It totally turned half the banana brown which I was trying to do. So it was pretty awesome. All right, so the end results are when I did this, I had the submerge into the water right here. But you can see the steam of the water, boiling water really made it turn more brown than in the water. So I decided to do a second experiment. So this is the one that I had the skewers on. And then this one I just used tongs and held it over the boiling water so the steam would hit it. And you can see it totally browned it like I wanted. Totally browned it like I wanted what I thought I was gonna do just with the steam changing it to half and half compared to this one up here that was submerged in the water. So now we're gonna make a prediction. I'm gonna open these up and we're gonna see if they got brown on the inside. So like, is it gonna be brown here to here and then normal this way? And then this one maybe only brown right here and this one maybe light brown or not brown. We're gonna see in just a second as I'm gonna reveal these here. So make your prediction. We'll start with the boiled one first and we're gonna open up the banana. And you can see it's, nope, it's not brown at all. All the way down, there's a little bit, here you can see it's just the peel itself but the banana is not brown at all. It's got the skewers but it's not brown where the skin was. So I'm assuming the steam's gonna be probably the same prediction but we're gonna open this up and peel these down here. Oh, see, look at that, it's brown there but no, the brown does not go through right there which is pretty cool. I would assume that it was gonna go all the way through. So there it is all the way and we can see it was not brown. It doesn't affect the banana and I'm going to tell you the science behind it on why bananas get brown next. So the science behind this all comes down to a chemical called polyphenol oxidase, a PPO. This chemical oxidizes adds oxygen to a type of chemical called phenol. These oxidized phenols join together with other compounds to make the color brown. Polyphenol oxidase is normally contained inside certain parts of plant cells. When the cells are damaged, the PPO escapes and starts the browning process. That's why the bruised bananas go brown and it's also what happens in this activity. All right, so I hope you enjoyed this experiment. It was not what I thought it was gonna be. It did not turn brown even though the outside turned brown just like I wanted it to but it did not affect the inside. So I hope you enjoyed this video. If you did remember to click thumbs up and to subscribe and thanks for watching.