Is Your Buffalo Ready for Kindergarten? by Audrey Vernick - Swap Buffalo for child and this is a kids into to their first few days of Kindergarten. A little on the long side but if you save it for your last storytime of the season before school starts your pre-preschoolers are better at sitting still for longer stories. Pretty humorous and possibly useful content.
Pete the Cat Rocking in My School Shoes by Eric Litwin- Fun sing along chorus in this book will be a great opportunity for some audience participation.