Help with a texturizer and blow dryer attachment

  Does anyone know about the product Luster's 360 multi look blow out kit.  I want to try this on two of my boys that have long hair that I braid every two weeks.  They have type 2c (10 yr. old) and type 2b (8 yr. old) hair.  I don't want this texturizer to make their hair any curlier than it already is.  I was looking to make it a little straight  not bone straight.  I also wanted to know if anyone can send me a picture of a blow dryer attachment ( brush or comb) that can help me blow dry my oldest (type 2a) straight.  What can I use after I wash his hair and before I blow dry it to keep it from frizzing and breaking.  I want his hair to be blow dried straight like  Alicia Keys or Mya has theirs sometimes.  Please help School starts September 4.