My 2 1/2 year old son loves this book. I bought this book in September and I just gave this book to him yesterday as a prize from his potty chart. I wanted him to have it before Christmas so we would have plenty of time to read it. We have read it already 20 - 30 times and he loves it! He loves the twinkle lights at the back. This book is great for practicing counting (up to 5) and making animal noises. My son likes to count the trees and see how many trees are left in the truck after the truck makes a tree delivery.
Other reviewers listed problems with batteries; as I stated we haven't had any issues and we had read the book a lot and that doesn't count the number of times my son is just opening and closing the book to see the lights. But the batteries for the book are 3 LR1130/AG10 which is a pretty common battery in kids books that make noise, have lights, etc. I have purchased a big pack of these batteries from Amazon probably 6 months ago for a very inexpensive price because we probably have 5-6 books that use this same battery. Just a FYI for people that say that have battery issues and/or can't find the batteries, check Amazon.