well widget, my girls are a bit younger at 4 1/2 and 3 but they just love anything having to do with any disney princess. They just re-released Disney's The Little mermaid and have come out with a ton of Ariel toys. my 4 1/2 year old would take anything Ariel which you can get at toysrus or target. my 3 year old loves tinkerbell which is coming back out this year too. They also sell interactive books that come with their own cd's that tell the stories which is pretty cool. Nothing very different I guess, but that's what they are into...
My girls also love any of the fun bath soaps and lip glosses they sell at bath and body works. they have cute little hello kitty things in there now too. not sure if you can get them online but i'd think a 5 and 7 year old would love something like that.