I was thinking about what if you DO want the prairie points to be all different? I suppose you could take squares, maybe charm squares, and draw a quick line down the center. Lay them out in the order you want and just start feeding them through the sewing machine with a very small seam allowance like 1/8" just to hold them, alternating one on top, one on bottom. Or maybe they wouldn't need to be alternating top and bottom, just lay the next one on the center line of the last one as you come to in when sewing. I'll have to try it.
I have no idea how regular prairie points are done... maybe just like that so this is nothing new!