You should add Google to your internetfriends:
http://havenandhearth.wikia.com/wiki/Haven_and_Hearth_WikiSummary:
Catch Silkmoths ( theyre flying around ( fast ) at night ), you will need a male and a female.
Put both in a container, wait.
Voila, silkmoths gone, silkmoth eggs there. put them on a herbalist table, wait again.
yay, silkmothlarvae! Put them in a container together with 4 mulberry leaves for each larva, wait again.
There they are, silkpuppets. if you wait even longer, silkmoths will hatch, but this is the stage where you can unravel the puppets over a boiling couldron.