L.A.
would you ever consider a clown at your house? my sis does this professionally and she is great with boys too (she has 3 of them, around the same age as your boys), she does balloon animals, face painting, has a pet rabbit and magic tricks and can dress less "girly" too. I just know going to birthday parties at bounce houses and such gets tiring after a while, and outside things are unpredictable in January in Texas
here is her website:
http://www.partywithpookie.com/