I just searched my history, but didn't find what I was looking for. There is a blog out in cyberspace that has patterns and talks about this type of blanket and what it does for the kids and possible for the aged dementia/Alzheimer's person. What they did was make a quilt top with pockets with velcro closure and put 2 oz of pellets in a sealed bag. That way you can add or subtract the ounces needed also you can add more row as the child grows when needed. The general rule of thumb is to have the blanket weight 10% of the person's body weight. They say that these work wonders for calming.... good luck and keep us posted!