My 4th grader and 1st grader love to read, and we got this audio book for car rides. It is read by B.D. Wong (he is an actor that used to be on Law & Order SVU). Wong was a great reader and provided excellent voices for all of the characters in this beloved story by Beverly Cleary. As an adult, I even enjoyed listening to the book...most likely because Wong read it so well. He has a background on Broadway and really brought some voice talent to the reading. I find my liking of an audio book greatly depends on how well it is read out loud, this book had a great reader and was a fun story for my kids.
The Mouse and the Motorcycle CD (Ralph Mouse)