It just so happens that my daughter is going through a phase where she is totally digging picture books featuring pigs. So here are some books that I've been reading to her that feature them piggies. An art lesson could reveal how the illustration style of the pigs, or other animals, are similar and different from book to book.
DREAM BIG, LITTLE PIG! (Picture Book-Sourcebooks Jabberwocky) by Kristi Yamaguchi, Illust. by Tim Bowers- Poppy the pig struggles with ballet dancing, singing, and modeling before she discovers her true calling- ice-skating....and perhaps flying.
PIGGIES IN THE KITCHEN! (Picture Book- Simon & Schuster) by Michelle Meadows, Illust. by Ard Hoyt- In this rhyming book, a bunch of pigs scramble to prepare baked goods and a surprise birthday cake for their mother.
PIGS ROCK! (Picture Book-Viking) by Melanie Davis Jones, Illust. by Bob Staake- A group of musical pigs play in a touring band.
RICHARD SCARRY'S BEST MOTHER GOOSE EVER (Picture Book-Golden Books) by Richard Scarry- Traditional Mother Goose rhymes are accompanied by fun illustrations of Richard Scarry's animals, many of which are pigs. I've read many, though not all, of these poems aloud to my daughter.