From the Publisher:
What could possibly be as appealing as Anna Dewdney's llamas? Anna Dewdney's trucks!
The Big Rigs are working hard at the construction site when Little Excavator rolls up, eager to help. But Little Excavator isn't big enough to CHUG CHUG CHUG! like the Dump Truck as it loads dirt to lug or MOUND MOUND MOUND! like the 'Dozer as it pushes up the ground. Little Excavator wants to smooth out bumps and dig up dirt, but he is just too small. As Big Rigs around him WORK WORK WORK! they finally find a job that no other machine can do.
Except for Little Excavator!