"Push" McCallahan is a hardworking bulldozer who's on the construction site before the other big work machines have had their first cup of morning diesel. After he's finished moving dirt and rock, it's off to build a road, help fight fires, and pull up some tree stumps at the farm It's all in a day's work for this tough-but-lovable earthmover, brought to life by popular Little Golden Book illustrator Bob Staake.