If you think that sewing isn't for you, think again. These curve stitching patterns look fantastic and once you've got the hang of it, they take next to no time to do. All you need is a little bit of coordinate knowhow!
You'll need:

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It is useful to practise this just by drawing lines using your ruler to start with, then you'll be more confident when it comes to the real curved stitching. Here's how to practise:
 Using the ruler and pencil, draw a set of axes on a piece of
scrap paper numbered from 010 in both directions like the ones
below:
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 Join the 1 on the xaxis to the 9 on the yaxis with a straight
line. Your diagram should now look like this:
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 In the same way, join the 2 on the xaxis to the 8 on the
yaxis with a straight line:
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 Continue like this, joining numbers on the xaxis to numbers on
the yaxis, making a total of 10 each time. You should end up with
this pattern:
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Now that you've had a go on paper, you're ready to stitch!
 Draw the same set of axes as above onto a piece of thin card
(use about 1cm to one unit).
It is useful to use pencil so that you can rub them out later if you want.  With the blutack or plasticine behind the card, push the needle through each point on the axes to make a small hole.
 Cut a length of thread (about 50cm long  if it's too long you'll get in a tangle!).
 Thread one end through the needle a short way.
You may need an adult to help with this part.  Tie a knot at the other end (the long end) of the thread.
 Carefully push the needle through the card so that it comes up at (0,0).
Push the needle down through the point (0,10) so that you have a line of thread over the y axis. Image Push the needle up again at (0,9) and down into (1,0).
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Push the needle up at (2,0) and down into (0,8).  Continue in the same way until you push the needle down into (0,0) again.
Unthread the needle and tape down the end on the back of the card. Image Cut off any thread which is not needed.
 If you want, you can rub out the numbers on your axes now.
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There are lots of variations on this curve stitching idea. Why not try some of these:
Extend the axes, for example:
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 Use binca (which you can buy from craft shops or on the web)
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 Use your curved stitching patterns as part of a larger picture
 Try overlapping several curves to make interesting shapes