Learning to read

Sometimes I think I am not cut out to teach a child to read.....
Alexandra (7yrs old) seems to think that learning to read is a lil hard and she has given up on even trying. She will read Dick and Jane all day long and can read it just fine. When given her sight words, she just looks at them and does not do anything.
Tanner (5 yrs old) is doing much better than Alexandra. He can figure out the words just by hearing me sound them out. Now keep in mind that he is working on 2 letter words. I have not started him on books just yet. He just gets to see the words as sight words, for now.
Updates to come on their progress.