My button jar is now a pincushion too!!
This was so simple - just a circle of fabric (about three times the diameter of the jar lid) with a quick running stitch all around the edge. Stuff with wadding, pull stitching tight and tie off.
Then you just glue it onto the lid, I used a hot glue gun.
To finish off I glued two lengths of ribbon around the base of the lid and covered the join with a glued on button.
I have had to tidy my sewing desk to give it pride of place :)
More Handmade Thursdays at http://whitelilygreen.blogspot.com.