Our family - with kids ages 3, 6, 9, and 11 - all love the "Bear books" written by Karma Wilson and illustrated by Jane Chapman. The first one, Bear Snores On, is the story of Bear, slumbering at the end of winter, and his woodland friends gathering in anticipation of his awakening. The artwork is wonderful and the text is lyrical, with wonderful repetition that the kids pick up on right away.
There are six Bear books currently. Here are the additional five titles, with lots of copies available for checking out at the library: