I actually think it would be perfect for her. My son was 5 this past September. I did MFW K with him and ended up having to supplement it with math and Sonlight's Core in order to give him everything I wanted for kindergarten. I do think it's a very good program for a 4 year old. It's lots of easy crafts, talking about simple science ideas, etc... However, I do agree with the others that you probably would want to do a more agressive K program with her before doing the 1st grade. My 3 year old did most of the crafts and projects and storybook reading right along with us. Of course, she was too young for some parts, but I just did what she could and let her do puzzles and activities when she wasn't interested. Luckily, it's inexpensive enough that you would easily be able to set it aside if it didn't work for you.