These three pets are available for a $1 (Frogdrate), $5 (Frogdrate and Ecarena), and $10 (all three!) donation, respectively. You will receive all pets valued at and under your donation amount -- so if you donate $10, you get all three of them! (You can also buy multiple sets with higher donation amounts!)
Receiving a pet will also award you the #LythforAustralia achievement.
I would love all the babies! My name is blocked out for safety :3