And what could be easier than oil and water?
To make it easier to see the two different liquids, and to add to the excitement, I added some food coloring to the water before we got started.
A pair of plastic bottles with screw-on lids allowed each of them to conduct their own experiment, without making a mess.
Once they had carefully examined their colored water, I gave each of them a small container of vegetable oil to add to it.
Before they poured it in, I asked them to make a few guesses what would happen.
Then they had fun tilting the containers side to side, watching the oil and water waves. With the lid screwed on securely, they were able to shake it to their hearts content.
After a while I got out another container. This time I started the experiment with several inches of oil in it. They used an eye dropper to add drops of colored water into the oil.
(I think this was my favorite part of our experiment — so pretty!)
When we were finished for the day, we kept the oil and water mix in the two sealed containers.
The next day they were asking to do more science, and I was ready!
While doing some spring cleaning, I stumbled upon some old Efferdent tablets I used to use to clean my retainers. (Yup, pretty old!)
Efferdent causes bubbles in water. I was pretty sure we’d get some fun results if we put it in our containers of colored water and oil.
And I was not disappointed!
We added 1/2 an Efferdent tablet at a time. The kids had fun watching the bubbles rise up, into the oil layer.
One thing I forgot about Efferdent is that it causes the water to turn blue; so our red food coloring turned purple by the end of it. My daughter got a kick out of that!
We are looking forward to our next day of science!
What science fun have you had with little ones?