I'm not sure who much these are actually used. They may be simply a design project. But they look plausible. In fact, I think I'll make some for guests.
You remove the spring from a wooden or plastic spring clothespin, and insert it between two chop sticks -- perhaps with a little grove shaved on the chop stick shank. The result is a pair that is easy to use and requires no life-long skill to pick up grains of rice.