Age range 0 to 3. The original sound book series has a new addition: the Busy Vehicles Books! There are 4 exciting titles in the series, each page shaped like one of the 24 different vehicles, and a button to press on each page for some laugh-out loud fun at what each vehicle sounds like in action. Children will keep coming back to these books, as they learn something new with each reading, discovering the special jobs - on land, in construction, as emergency rescue, or over water - that each vehicle has. Every page will be a new adventure!