What do Grave Digger and Monster Mutt have in common? Big tires that crush cars! Spark early readers' natural curiosity about cool rides with this inquiry-based nonfiction approach to monster trucks. Back in the 1970s, people put giant tires on pickups. Monster trucks were born. Now you can see them in action catching air, spinning donuts, and doing backflips at monster truck shows. Appeal to budding car lovers with this question-and-answer...