Cute Pincushions! If you use the glass things for weight, you might dull your pins when you stick them in. Go one better and make a little sack to put in the middle of the pincushion and fill it with those ground pecan or walnut shells that you can buy at a pet store. They are in the section for using for scattering in the bottom of a cage. The shells have an oil to them that will smooth your pins and needles and keep them sharper.
Just an idea! Hugs, Anne in AZ