I'd say go for the bluegill also. Be patient tho. I've taken my 7 year old neice fishing with me, and she really had fun but she ended up wanting to play on the playground after a half hour. Stuff like that is ok, dont rush them into it. Just let her get a taste of it.

I also introduced my girlfriend to it. She was more interested in pink fishing poles and plastic worms rather than than real worms so i took her to a little pond loaded with bass and she was catching them right away. Shes not addicted to it by any means but every once in a while i let her know how much i enjoy fishing with her and she gets excited to go out and do it again. So id say just be patient, put her on the fish, and let her know how much you enjoyed the time with her and she'll be back for more