I have used a screen popper over heated coils for 50 years...then add unsalted butter and popcorn salt.  Perfecto!  Too many of these did not pop fully to cut the mustard.  Perhaps hot oil fans will have more success.  Or hot air poppers--but being so small my guess is these kernels will exit before popping?  I ended up with too many old maids that tested the ivory.  Also, I usually use 1/3 cup of popcorn to fill the screen popper.  I used OVER 1/3 cup for this and only filled the screen 3/4 full--my first clue that too little popping was going on.  My guess is that the smaller kernels are trickier to pop fully.  My search continues.  Next up is their Baby Rice.  My dentist is loving it.