Way back in September 2013 when I officially kicked off my seven-year-old’s first grade year, I thought we were going to start a project on mushrooms. That’s what he had been talking about for awhile. He had mentioned DNA once, I think. So on that first day, when I pulled out the journal I try to keep updated with the things he talks about/asks about/says he wants to do, and how we follow up on them, I read off what he had recently told me, and he surprised me by saying he wanted to do a DNA project first. So that’s what we did.
(We also did some work with mushrooms, and I’ll write about that in my next PBH post.)
What he wanted to do most of all was build a DNA model. Remember how I told you he’s turning into a little builder? He wanted to buy a kit to build the DNA model, and maybe because his birthday had just passed, I told him he could buy one with his own money, if he really wanted it. But I suggested we look around at our supplies and try to make a homemade DNA model first. He agreed to that, and I tried to go with his ideas on what to use for the model. We ended up using ribbon, straws and pipe cleaners:
I didn’t think we would get it to stand up or twist, but I didn’t say anything, and look what he managed to do? Over time, it has fallen down, however, and he replaced the two pieces of cardboard holding it up with popsicle sticks glued together. That hasn’t held together well either, but he still has this model in his room. I was pretty proud of him for making this!
He still wanted the kit, so then I let him order it. I found the ScienceWiz DNA kit on Amazon, and I highly recommend it. It has a lot of cool experiments and little pieces that you can put together to make a nice DNA model. My little builder did that first.
This is one of my favorite photos of him ever. And I love all these photos I took of him putting together this kit. He is happy. He’s in his element. They speak volumes about who this kid is, so I’ll treasure them forever.
And we did more than that! First, we checked out The Usborne Introduction to Genes and DNA by Anna Claybourne from the library, and we read most of that book in several, short sittings. I think we checked out some other books, but this was the one he was interested in listening to once we got home. It’s a beautiful book. I wish we owned it. Some of it was a little hard for him to understand, but I think he got the gist of what DNA is. I mean, this isn’t an easy topic for ME, so I wasn’t worried if he didn’t understand everything.
Around this time we watched a documentary about the human genome project (I’m sorry I can’t remember the title). I think my son was able to understand it a little better having learned about DNA!
We had the most fun when we extracted DNA from a kiwi fruit! The instructions and most of the supplies were in the DNA kit. If we try it again someday, I may post the instructions on my blog, but for now I’ll send you over to one of my favorite blogs, The Scientific Mom. She’s got some instructions for you there. Because for some reason, though we could see DNA in the final step, we couldn’t pull the strands of DNA out of the tube. We had wanted to see them under a microscope. After they warmed up in just a few seconds, they seemed to disappear in the tub. So, I’m hoping we can try it again sometime with a different fruit.
Though you can’t really see it in the photo, we could see strands of DNA in the tube. (It looked like gooey string.) We could see it even better after putting it into the freezer for several hours.
There are several more activities to do in the kit, but after this one, my son seemed satisfied. Recently, however, he said he would like to do another project from the kit, so maybe we’ll do that this summer. Though the DNA project lost its momentum after this, I’ve seen it come up here and there, such as when they were playing with their zoob pieces.
And even just a week or two ago the four-year-old was practicing writing his letters on a dry erase board, and he thought he’d add some DNA to his number practice. :) What a memory!
All our projects are open-ended. I remind my son about his projects, and if he’s not interested in pursuing them further, that’s okay. (Although I admit sometimes that disappoints me because I want to learn more!) He seemed to lose interest in this after we finished extracting DNA from the kiwi fruit. Indeed, that felt like a grand finale! But this is a project I think we’ll continue over the long-term as we do more with that DNA kit, and maybe as he gets older, he’ll be able to better understand DNA and that will help him too.
Have you tried extracting DNA from fruit? I would love to hear about your experience.