Fireworks in a jar is another experiment I pinned in the summer and just found a reason to try. That reason of course was our New Year's Eve Party. I used this little experiment as one of the activities in our balloon countdown. The girls loved it! We did it over and over, and it was A LOT warmer then outdoor fireworks!
I tried to do it like they show on I Can Teach My Child, but it didn't work for me. So we found our own way!
To start with you need a clear container, the taller the better. Fill the container about two thirds full of water (this is not at all exact, but you need some room on the top) and add a layer of oil on top. The oil doesn't have to be extremely thick. We used anywhere from 1/2 inch to and inch of oil.
Now you just need to drop liquid food coloring on top of the oil. The white binder was only there to make the colors stand out more for my camera. We did it a few times without the binder as well.
The food coloring is water soluble, so it will not dissolve in the oil. Instead it will make its way through the oil into the water where is dissipates, coloring the water. I really like the drops of food coloring suspended in the oil.
The firework part comes in when it enters the water. The food coloring enters as a drop and then balloons out forming a shape very similar to the large aerial fireworks.