I had tadpoles until 1 by 1 they died...and 1 survived to look like your friend there, which was when I decided to throw him out as it didn't look quite so much like a 'pet' anymore.

Quick list of animals I've had in my childhood - grasshoppers, fish, lobsters, tadpoles, hare, cats, dogs, hamsters, guinea pigs, snails (!!!), these at the top of my head.
Parents were quite accommodating since I am an only child, though they never allowed birds....winged creatures stuck in cages didn't feel right for them.