I have made these for our Head Start Centers. I put either buck wheat or rice in my blankets. I use muslin to make the part that holds the buck wheat or rice and a cover that can be removed and washed. It is amazing how well these work even for those that just can't seem to settle down for rest time. There are some online to buy but no patterns that I have found. I sewed channels and filled them them up a ways then sewed across the channels over and over until th channels were all filled. The teaching staff love them.