I agree Bro.i'd say any age, i had a cat since i was 1 yr old (sadly he passed away almost a year ago)
but they are always good to teach you responsibilities
Depends what type of pet. Mainstream pets such as dogs, cats, rabbits, guinea pigs, goldfish, budgies and hamsters should be fine for anyone over 5. More exotic animals that are more difficult to keep, such as tropical fish, amphibians, reptiles, foxes, ferrets, hedgehogs and some types of birds are better for people 13-16+, depending on the pet.I think the most apropriate age is around 13