Though he is only 3 years old, my grandson absolutely loves this book (and all Berenstain Bears books)! My grandson takes monthly field trips at day care on "the big yellow bus" so this book held definite appeal to him. The length of the book is just right, it is easy for me to read to him (not too "wordy") and the pictures are enjoyable for him to look at. I'm certain for an early reader this book would be very easy to read and understand. I would highly recommend it.