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.

Balloon Trees by Danna Smith illustrated by Laurie Allen Klein

For kids who love balloons this will be an interesting book!  It starts in a forest of rubber trees where latex is tapped and continues to the factory where they are made.
I found it fascinating!
In the back the author has more information about rubber, a little quiz-like, a sequencing page, and a true or false page.
Wish the map on the information page was bigger-difficult to read the words/map key.