For 9 year old girls some good websites are webkinz, neopets, stardoll, and girlsense. Another goood website is Groovy Girls.
Fantage.com LPS.com whyville.com allgirlsarcade.com
lemonparty.org tons of dress up games, etc.
AGAME.com
bubblegum club
Candystand or Squiglys Playhouse are good sites =)
There is a large variety of websites that are fun and suitable for five-year-old girls - however I can only name a few:- (See related Links)
tv.disney.godisneychannelwebkinzmillsberrypostopiamyscene.everythinggirlbratz
ggg.com
meez is a fun website for both boys and girls
that just for girls is a wack website
Dress Up Who.com disney.com