Some people have recently asked what a soaker is and what a soaker sack is.
A soaker is a wool diaper cover. It replaces PUL or vinyl diaper covers. It is not water "proof", in the sense that if you get a pitcher of water and pour it in, the water will run through the knitting. But unlike other fabrics, wool will not wick liquids. So unless your cloth diaper is so wet that it's dripping (in which case, it's WAY too wet anyway) the wool will keep whatever is outside dry.
Wool also has lanolin in it, which has the wonderful chemical ability to neutralize urine. Which means that until the lanolin in the soaker is used up, it won't smell.
A soaker sack is like a little skirt. It works the same way, but it just goes around the waist and hangs down over little toes. These are generally just used for the first few months, often at night, because newborns have wiggly, and often uncooperative legs and it's just easier to pull up and pull down, without having to worry about putting legs into leg holes.
I've also been asked how to dip dye. You can see how I did it here.
As for how I do the embroidery... well, I don't know how to answer that. I learned how to embroider from my grandmother about 30 years ago. I've done it occasionally over the years to add decoration to things, denim jackets were fun. I've adapted to work over knitting. If it's a simple design I just do it free hand. If it's complex like the fairies I sketch what I want on knitting graph paper (they are little rectangles instead of squares). and use that as a guideline. Duplicate stitch is a good way to fill in large spaces. The Reader's Digest Complete Guide to Needlework is a book I've had for decades and still refer to it regularly for stitch ideas.