I use weebly but to me it looks to fancy, wix doesn't let you change the beginning bit and wordpress doesn't work for me, i really want a good website for her that looks cute and fun not all fancy looking.
I haven't used Wix or Wordpress, but Weebly allows for a lot of customization. If you experiment with some fonts (in the Theme part of the toolbar; maybe the handwritten ones are what you're looking for?) and change the theme, it could help. Do you have an example of what you mean by "cute and fun?"