First step is to cut all of your 3"x3" squares. This is a bit of a time consuming job, but it is very important that you get these the right size - it'll save you a lot of hassle later so take your time! Use a rotary cutter and cutting mat to make this easier and quicker.
You can then start assembling 3"x3" blocks. The easiest way to assemble these is in strips amnd then join up each of the three strips. Make sure you match up the joints as closely as possible, pin them to help you. all seams are 1/4" - if you have a 1/4" machine foot use it!
You should have 10 of the 3"x3" square blocks in total.
Next come the deconstructing phase. Cut each of yours 3x3 square blocks into equal quarters. Invert two opposite corners and sew together back into a block.
Do this for all 10 squares.
Cut ten 7.5"x7.5" squares out of your plain cotton.
Try out a few designs on a flat surface and make sure you have your favourite before you start sewing them together. You can put them in any direction.
Sew the blocks together in strips and then join each strip together. You should end up with a baby blanket that is 5"x4" blocks in size.
Now it is time to layer! Iron your backing fabric and place front side down on a large flat surface. To help keep it flat whilst pinning the layers together, secure the backing fabric to the floor with tape.
After you have got your backing fabric as flat as possible you need to layer on the batting, followed by the patchwork front (front side up). You will now have sandwiched your quilt together.
Make sure that all layers are securely pinned together. Curved safety pins are great for this!
You have reached the quilting stage, choose your design and decide whether you're going to hand or machine quilt. We decided to hand quilt the baby blanket and wanted to make our stitches fairly visible, so placed them in the plain squares. you can do whatever design you want here. Be experimental!
Trim your quilt to one size. Use a ruler and a rotary cutter and trim the excess backing and batting to the correct size.
After trimmming it is time to add your binding. Iron you binding in half lengthways.
Machine sew the binding on to the quilt front. Make sure that you are sewing all of the raw edges together. You can do this in one continuous piece. There is no need to sew each piece of binding together, you can simply tuck the new piece inside the last.
Slip stitch the other side of the binding to the back of the quilt. This should be almost invisible and will finish the quilt off beautifully!
Sit back and admire your creation!