Wham-a-hammer, bam-a-slamma! The construction crew is back - but what are they building this time? Crash-a-rumble!Smash-a-grumble!What's at work? Here's a clue: It will clear the ground for you. Bulldozer! Coming through! Diggers, dump trucks, rollers, and more - it takes a lot of big, noisy machines to build a school!