I still use a wireless variation of his "El Cheapo" electronic call. Works great! And it's amazing how many different animal sounds are on the web. (My son called in a dog last winter while goofing off with a bull elephant call!) Of course, after I took over one of the kids' Ipod, I had to buy them another one. For some reason, my daughter didn't like the "coyote killing rabbit" song.
+1 for Varmint Al!