First foamy I ever made was the leadfeather yak. It wasn't hard to make; even for my first time. To this day it's one of the best flying foamies I've got.
I've got a Techone Piaget right next to it. You can make fun of Hobby King all you want but this plane flys very well, builds easy, and takes a beatin'.
Both are cheap.
Oh and www.rcfoam.com
is one of many for foam.