I take Bella to the public library almost every day and we always come home with some books. So I gave her one of the library bags I've made for my online store (bellasparty.etsy.com)
It is big enough for her to carry lots of big and smaller books... and some toys as well. And there is a pocket on the outside for the library card that she loves to handle to the lady when we check the books out.
She looks so cute holding it and she loves the owl applique on the outside.