Oh I will put this into our family bucket list for next holiday. My 12yo said she wants to be a marine biologist and swimming with turtle will sounds perfect for her.
If you can get up to Bundaberg, then a visit to Mon Repos would also be fantastic for your daughter - but book as the no of places do get booked out, esp during holidays.
Read more here:
https://www.weekendnotes.com/mon-repos-conservation-park/