Colouring added to the water (or you can colour separately by hand after its kneaded)
Add everything to the bowl.
Blitz on speed 7 until just combined.
Knead for two minutes.
If its too dry to your liking just add a little bit of water at a time to reach your desired consistency. If its too wet for your liking add a little more flour. I find playdough texture is a very personal thing.