![Image of Science experiment!](https://files.schudio.com/roseberry-academy/images/blog/5B2341FE-9444-48F2-9283-418F77119A61.jpeg)
The children have been growing their very own rainbows! This scientific process is called the capillary action. The action happens when a liquid moves up through a hollow tube or into a spongy, solid material. It happens when 3 forces work together: cohesion, adhesion and surface tension.