You must check out this amazing handmade busy book at Little Hands Big Work! There are lots of great ideas for making your own; my favorite is the animals hiding in the the felt "grass", brilliant!
Sarah Olmsted: Imagine Childhood: Exploring the World through Nature, Imagination, and Play
Amie Plumley: Sewing School: 21 Sewing Projects Kids Will Love to Make
Rae Grant: Crafting Fun: 101 Things to Make and Do with Kids
Marie Hablitzel: Draw Write Now, Book 1: On the Farm-Kids and Critters-Storybook Characters