The second title could be because kids grow so fast & recycle is smart way of living. This is simple recycle project perfect for every beginner. I did use serger, but if you don(tm)t have it, just use your sewing machine, just make sure you will finished the stitches with zig zag before sewing them together. It is useful if you sew with a little bit zig zag so the seam will have a little stretch in it. You could use all stretch fabric " knits are better then woven sweaters. Let me show you the finished pants before we start cutting our sweaters. The same meted is also useful for baby pants, all you need is just measure (approximately) how long the legs need to be. A little bigger men(tm)s sweaters could be useful even for 6 years kid, just measure twice and cut once (I could use this advice too!). But better learn on other mistakes then on yours, right? Enjoy. NOTE: I just realized, with for cuts, and two seams, your project is finished. How great is this?