It looks super colourful and is a great way to colour code things.
Step 1: Things You Will Need
The brand that I used was Faber-Castell.
Make sure that you have the lids of the textas facing down so you can still use them.
That's basically all you need to do but, WARNING do not lift the circles up or else the contents will go everywhere! If you don't want this to happen you can hot glue gun the texta lids to a round piece of cardboard.