Foam is absolutely easy, and needs no special tools. It's incredibly strong too. Check out the Tips on Bayou Boys RC site.
http://members.cox.net/1454s/BBRC/TIPSx.html
In the "airframe" section they detail building with foam, with lots of pics and good details.
Don't skip over foam just because you have not tried it. Leaves out a lot great kit's in future.