The Small Kitten

Even though most cats retain their cuteness, one must confess and agree that the small ones are the cutest. They are the reason people are having cats. Now that catching mouses is not really needed anymore in the western world, cats rely on their cuteness to be served food every day.
The Panda Cub

The Chinese know perfectly well why they take the panda as their national animal. It looks extremely cute and eats bamboo. How is that for being cool. The WWF has taken a panda as their Mascot too and I must wholeheartedly agree that a panda cub is one of the cutest fluffy things ever.
The Polar Bear Cub

This is a picture of Knut the famous polar bear cub from the Berlin zoo. To be able to get onto the cover of Vanity Fair magazine amongst so many others you need to be really really cute. Polar bears are dying because of global warming, so maybe you can think of Knut before you waste all that electricity by continuing your habit of not unplugging electrical appliances.
The Small Bunny

This animal is the basis for figures like Roger Rabbit, Bugs Bunny and all other cartoon rabbits. Let's face it, a rabbit hopping around and eating veggies has an extreme sense of cuteness and it only gets worse if it's a baby bunny.
All these animals have cute eyes and fur, so maybe that is the key to their success, I doubt anyone will argue against me stating that I shouldn't have used a picture of a mole rat here.
Good fun, good fun. :-P