Baby blankets. Soft, cuddly, sleep-inducing (fingers crossed) and super easy to make. If you can cut out a rectangle and sew a straight line you're winning. I've made a few of these for friend's babies and each time i've adjusted the measurements to make it slightly smaller. The first one I made was at least four times as large and more suited to a large adult (or as I liked to think a blanky for life). Anyway, I think I have the dimensions just about right now. This was the first thing I made for little BB and I love it. The material is minky on one side and flannel on the other, so super soft and snuggly. And this is how you can make your own...
Cut 2x rectangles each measuring 33in x 43in (this is allowing for a 1.5in seam allowance, so your finished blanket will be 30in x 40in).
With right sides together match edges, pin and sew the two long sides and one short side. You want to leave one short side open to allow you to flip it the right way later.
N.B the below illustration is to show the right sides of the fabric are together...not how to align the fabric. You want to match each side so it's flush, not off-centre, as pictured.
Cut off each corner...this will allow the seam to sit flat and give you nice sharp corners. Flip the blanket inside out so the right sides of the fabric are now on the outside. You might want to use a knitting needle or the like to push out the corners.
Sew the open short edge closed. And you're done! Some people like to top stitch all the way round the blanket. I don't a) because I can't be bothered, and b) because I never end up with a completely straight line so the finished blanket looks a bit wonky.