My boys, growing up, loved this book! Now they have their own sons and each have a copy. Even my granddaughters have fun. I keep it on hand for "boy" baby gifts because it is so much fun to look at the pictures and find the "goldbug".
Our boys enjoyed looking at the pictures and learning the names of the different types of vehicles from 1 year on. I gave a copy to the 1 year old son of a good friend and she thought I was nuts. She later told me he loved it. All this was 25 years ago. I am buying a copy for my grandson!