Oh My God!! They are so adoreable that I got tears in my eyes over how adoreable they are. They are just to sweet for words with all that white fur and those pink noses and ears..

That cage needs a hammock... see in this old thread here. These boys LOVED the hammock and it was a lot smaller cage than what you have so you have plenty of room for one....or two.
http://petoftheday.com/talk/showthre...57#post1019357