Sweet rainbows.

During the last several days we were making activities dedicated to the Rainbow. We’ve invented an interesting and easy way to make a Sweet rainbow in a vial (or in a narrow glass) and had some fun colouring paper towels.



I have recently purchased a Usborn book “What science is all about?” and we read about the light, colour formation, and the way each colour reflects from the objects of different colours. This information is not easy for the 5 y.o. to understand, when it is read from a book. Every now and then I stopped and explained him what I’ve just read and we discussed it.When we finished reading I suggested to draw what we’ve learned. My boy was happy to make the arrows, which showed the reflecting colours. And most of all he was happy to draw  the arrows which went to the black chest. We also looked at the objects around and he told me, which colours they reflect.

After reading about a Rainbow we decided to make it by ourselves. We made an experiment with coloured water and sugar. We actually made it a couple of times, because we were trying to invent a perfect solution to make it work best.

What you need:

4 glasses

3 jars



vial (or a narrow glass)

food coloring



3 droppers (if you use one, wash it with clear water between different colors)

In different jars prepare red, yellow and blue water (first time we mixed sugar right into the big jars and played with sweet water after it). Take syringe and add equal amount of colored water into each glass. To make purple colour after blue colour you should have two red glasses. Put the glasses in the next order: red, yellow, blue, and red. Add sugar into the water. 3 spoons into the first red, 2 spoons into the yellow, 1 spoon into the blue, and don’t add any sugar into the last red. Stir sugar until dissolved.

P.S. I don’t have many pictures, because I helped my boy.

Take vial and droppers and very accurately and slowly add coloured water into it. First add red with sugar, then yellow, blue and a little bit red again. Try not to shake the vial and not to push on the dropper too rapidly.

Your sweet rainbow is ready!

While my boy was making the experiment, he’d noticed that something interesting happens with the paper towel when he touches it with the stick.

So, after we finished the experiment I’ve suggested him to make some art. It turned into such an amazing activity! We’ve made a rainbow on the paper towel with droppers.

Then I suggested to take one more paper towel and to do something with it, when he said that he has an idea. He put a fresh paper towel on top of our rainbow and started to press!

It was interesting to watch him exploring all by himself and I let it go without interrupting.

After his second towel was colored he took one more.

At first he put it on top of his second, but it wasn’t wet enough and didn’t give enough liquid.

So, he moved it on his first rainbow and pressed, this time it worked better. But we all noticed that the colours faded on each next paper towel.

After colouring several more towels, he invented one more technique. He made a pattern on the table and then put the paper towel on it to see how it absorbs the coloured water. I had one happy kid after there was no water left.

If you use sugary water, you will have some nice crispy firm paper towels, when they dry. We still think what to do with them next.