Actually, I would be very cautious about having your daughter have any contact with your bird when bird is free, for now. A six year old can't help flinching and honestly all of us are likely to flinch from what seems like an unprovoked attack. It wasn't unprovoked, you know, the bird was triggered by something in her past, but your daughter was on the receiving end and innocent and frightened so you have every right to be shook. I would suggest several things. First, if you can, gather more information from previous owner. It would help to know what the trigger was "back when". They might be defensive if you tell them why you are asking so I would keep it general. Even without that information you can think about what makes your daughter different (in the conure's eyes) than you and your wife. She has a higher voice and "sneaks up" from below. She has quick movements. She ... you get the idea. To start to establish trust and let your daughter have some positive interaction with the parrot, perhaps she can help make the food and place it into the bowl holders (assuming your cage design would keep her safe from a quick nip). She can help set up treats and fruit kabaabs and the like (although you or wife should do the actual hanging of the Kabaab. In general, her interactions with your Sun should be protected and trust building on both sides. Now... take a breath.. but I am going to suggest that you give your daughter a keet of her very own. You already know how to tame them and they will provide her hours of fun, allow her to mimic your care of the Sun and will not hurt her. The keet will have a wonderful life as well. Just a thought... but it would give your daughter a chance to be fully engaged with a bird and learn skills that will help her as your larger parrot comes to trust her.