I don't think my ds really cares too much about the colors at this point. We have the pack of 8 from http://www.atoygarden.com (Really good prices!), so he has a bunch to choose from. He generally seems to grab whichever is easiest to get. If she has a favorite color, I'd probably go with that. But you might want to get a particular color if there's a particular use you can see her putting it to. If she has little toy fish or is really interested in swimming, blue for water could be nice. Or, if she's goofy like ds, and might enjoy you balling it up and tossing it at her while calling out, "Snowball!", then white could be good. (Although we don't have a white one and just do the snowball thing with all of ours.)