I ‘adopted’ an orangutan through the WWF. It is a symbolic adoption, as the donation goes towards their general conservation efforts (though specifically to conserve the habitat of the species you have sponsored).
The ‘adoption’ comes with an information pack about the animal and a plush toy, which I sent as a gift to a friend with a young child.
‘Adopting’ species through WWF – http://gifts.worldwildlife.org/gift-center/gifts/Species-Adoptions.aspx
WWF – https://www.worldwildlife.org/
Why orangutans matter to ecosystems & why they are threatened (scroll down) http://www.worldwildlife.org/species/orangutan