''Soft kitty, warm kitty, little ball of fur. Happy kitty, sleepy kitty, purr, purr, purr.'' Why, it's a super-cute Soft Kitty Backpack from The Big Bang Theory! We all know that Sheldon would be absolutely stoked if he got a chance to carry his geek stuff around in one of these bad boys - it's so cool and soft and adorable! Now you can totally keep your own stuff safe in The Big Bang Theory and Dr. Sheldon Cooper style with this sweet Big Bang Theory Soft Kitty Backpack.