What to adopt?

I am thinking of adopting an animal in a zoo for my son Benjamin 

My thinking is it will give him something to look forward to seeing when we visit family as we regularly visit Marwell Zoo and Chester Zoo if we visit either my grandparents or father so I'm thinking something in one of these would be nice

Plus it would give him something to research - ie what the animal is, eats, lives etc

Also he would know he is helping not only the zoo but helping towards that animals care and upkeep

So now the question is

What do I adopt for him? and this is where I need help with opinions.

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At Chester Zoo he can adopt one of the following for £50 a year and he adopts the species not a specific animal - so I could choose one of

• Red Pandas
• Giraffes, 
• Elephants, 
• Orangutans, 
• Tigers, 
• Meerkats, 
• Penguins
• Chimpanzees

and he will get 

• Two Admission Tickets that can be used at any time during the year of adoption (each ticket is valid for one adult or two seniors/children)

• A Cuddly toy

• Your name displayed on a 'Thank You' plaque near your adopted species (by 20th of following month)

• One complimentary copy of our Z magazine, packed with conservation news and zoo updates

• Thank you letter

• Thank you card

• Animal stickers

• Image of your adopted animal species

• Personal adoption certificate

• A fact sheet full of amazing facts about your chosen animal

• A puzzle sheet

(part of me is wondering though if these are their main animals or conservation projects and therefore need the most funding or they are child favourites - ie penguins)

For £55 a year there is more of a range but they don't get additional information or the teddy/stickers which I think ben would enjoy) Plus all these animals bar the panda he will see and not have to try and spot in an enclosure

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At Marwell he can adopt one of the following for £25 a year he can adopt a specific named animal and he gets 

Go Wild Scheme

For children. £25

• Adoption Certificate
• Recognition at your adopted animal's enclosure
• 1 FREE child ticket
• Photo + animal fact sheet
• Car sticker
• Online Adopters Zone

(with one of the animals named Below)

Isabella the Giraffe

Chico the Meerkat

Eva the Penguin

Wendy the Pygmy Hippo

Indeever the Snow Leopard

Kaia the Amur Leopard

But for £50 a month he can adopt any animal of 20 different species and the only added extra he gets is a subscription to the zoo's magazine 

Im thinking I could adopt him two animals in Marwell that he could specifically go looking for. What do you think?