Well not firearm related but thought you gentleman might like this. A few of us can remember playing with these also. I was bored today and the little harbor freight lathe was sitting there bored also. Dug out a piece of 1 3/8" poplar dowel rod. Ground up a nice basic turning tool ao a piece of 3/8 square HSS and honed it down with a nice radius. Cut 3 pieces of the dowel 2" long and faced them square. Turned up 3 thumb tops you spin snapping your fingers About 1 7/16 body dia nice little 3/8 stub with the point and a 1/8" shank to spin them with. Sanded them down and broke all the edges. working an oil finish into them now. They spin real good and look good and are getting better looking. Light enough they shouldn't damage surfaces either.
The 3 grandsons will be happy tomorrow. ( 7 5 and 1 1/2)
Here shortly Ill find some bigger pieces and make yo-yos.