Download and print out the easter egg template. Colour the paint tray cavities with sharpie markers.
Fill each paint tray cavity with rubbing alcohol. (The more alcohol that you add, the lighter your paint colour will be)
Use a paintbrush to mix up the sharpie markers and rubbing alcohol to create watercolour paints. (if you run out of paint colour, use a tissue to remove excess moisture and colour the cavity again with Sharpie and fill with more rubbing alcohol)