Zerby Derby (Long Version)

Esti-mates

While out exploring, Zack, Rex and Axle come across a low bridge. Axle can drive under fine but Zack gets stuck. They call the Construction Zerbies to help make the bridge tall enough not just for Zack, but for Rex as well. After this is done its fine for Zack, but Rex still can't make it. They realize they also need to make space under the bridge wide enough for Rex as well.