I had opportunity last week to construct a weighted blanket
for a friend whose daughter has some sensory issues.
This article explains the benefit of weighted blankets.
To make a weighted blanket as described here, plastic
beads are encased in squares so that the appropriate
amount of weight is distributed throughout. It's kind of like
a bunch of little bean bags all connected to each other.
This particular blanket had six pounds of weight
sewn into it, so I used a food scale and put 0.8 oz.
in each square. The funny part is that the beads are
added gradually throughout the sewing process,
so the blanket becomes heavier with each pass through
the sewing machine. By the last row of stitching, I
could hardly manage the blanket and all the beads!