This idea is found in Adventures In Natural Learning: Handbook
(You can see from the tell-tale dates on the photographs that we did this activity some years back! Yes, my books have been a LONG time in the making!).
Using block crayons I coloured random patches of colour, some swirls and flowers.
One of my children did one alongside me.
Then I turned the paper over and drew pencilled squares, using a ruler.
(The picture below shows that I wasn't concentrating the first time I ruled them, and had to do it again!)
Then I cut the picture into little pieces.
Using a larger piece of coloured paper, I stuck all the little squares in a different order to make my patchwork picture.
I was in a hurry (I usually am!) I didn't set the pieces out to make
sure they looked good BEFORE I glued them. Setting them out is a good
idea. I just figured it would look ok as long as I didn't have lots of
the same colour together. :o)