I think you've gotten a lot of excellent advice here already and I just wanted to put my 2 bits in regarding Conures. I have 3 kids, my 2 sons are 12 and 13 and my daughter is 18.
We got our first, a yellow sided green cheek conure and he's FABULOUS! (see pictures of him in my profile page) From all I've learned about larger parrots, our little Franklin has a large parrot personality all wrapped up in a cute little conure package. When we got Franklin home and introduced him to my kids, within a few minutes each of them said..."he's soo cool!" "if we were with you at the store, we'd have wanted you to buy him too." And each day, my kids love to have "their" bird time with Franklin. They are constantly chuckling, giggling and laughing at his antics.
Franklin is learning to talk (he's only 3 months old) Already he's saying pretty pretty pretty birdieee..wolf whistling and making kissing sounds. He's such an acrobat! Hanging upside down by one foot swinging on his toys, he loves to burrow under blankets and cuddle up for a snooze, he's very brave and bold without being mean.
He likes to flip onto his back and plays with our fingers, he'll grab hold of our finger and we'll lift him up, he flops his head back, similar to kids on a swing when swinging really high and throw their heads back...that's what Franklin does. He loves to climb and swing, he hops and runs and summersaults...he's truly the most amazing little bird I've ever owned...EVER! He loves to carry things in his beak, and lay on his back and play with balls...he holds food in his foot and eats just like a larger parrot would. He loves to bathe and although we spend lots of time with him out of his cage, he's happy as can be inside his cage as well.
I think a majority of conures have this same type of personality and are slightly less "needy" than a larger parrot. They are cheaper to care for and take up considerably less space in your home, and I'm willing to bet they aren't quite as messy as a large parrot.
We also have 2 cockatiels who are absolute joys as well, but have a much more "reserved" personality then our Franklin does.
Franklin is by far the most social bird I've ever owned and I wouldn't trade him for anything.
I know so many of us are lured by the sheer size, beauty and awe of the larger parrots, but we can become quickly intimidated once bitten...and trust me, THAT can take all the fun out of parrot ownership and quick too!
A conure's bite is tollerable, yes, they can draw blood, but they aren't likely to take off your finger.

Franklin has never done worse to any of us then an exploratory..."what's this?" test and if his "testing" get's too ouchy...we say to him..."OUCH! Beeee niiiiiice..." and he immediately backs off.
I also keep on hand, slices of apple, carrots, corn on the cob, grapes etc...so if he's seeming to be particularly more "beaky" then normal, I offer him up something he can sink his beak in.
Anyway, just my 2 cents about conures. I'd definitely put them in your "serious consideration" list.
I can't imagine life without ours.
Click on my call name to view my profile and see our Franklin.
Good luck with what ever you and your parents decide on.
Toni