This grid copy method breaks down each complete image into smaller boxes, allowing you to focus and simply draw one box of the image at a time. The best method is to start with the A1 grid box and go to the G7 box, easy enough for kids of most ages to be able to draw it.
Until you get used to it, focus only on what is in that special box you are working on.
Try to draw exactly what you see in the box
There are also a lot of fun ways...