"Builders must dig a deep hole. What big machine do they need? An EXCAVATOR!"
Bookworm's interest at 18 months: It seems like something else is always catching his eye when we're reading this, but I'd still recommend it wholeheartedly. I think he just has a lot of truck books at the moment.
"Empty yellow buses cross the town."
Bookworm's interest at 18 months: It was "buh buh buh buh" overload! He had to say "buh" for every bus, and the entire book is full of buses. I could barely get the text out over his shouting.