Zero, Zilch, Nada Counting to None by Wendy Ulmer illustrated by Laura Knorr

Harry, the rabbit, is excited to begin his first job at the balloon factory-blowing up balloons.  He runs into trouble though when he needs to count them and his choice to keep track of his counting ends in disaster.
Can use the book to talk about counting by 2's, 5's and 10's and equal grouping.
A bit long for the subject manner.