Big Pigs by Leslie Helakoski is low-down dirty fun. These three pig siblings, Clean Bean, Nibbles, and Sweet Pea are challenging each other to see who is the bigger pig. The bright, cartoon, acrylic paintings are a delight. And of course, being pigs, Mama Pig is so proud of her brood.
This title has lots of rhyming and alliteration for the preschool and kindergarten group. This will fit in with a Storytime on pigs, siblings, or a general farm theme too. I'd use this for the fun factor no matter what theme I put it with.