A heartwarming collection of three hard-cover children's books:

Zero is the Leaves on the Trees by Betsy Franco.  Illustrations by Shino Arihara. 

I Call My Grandma Nana  and  I Call My GrandpaPapa by Ashley Wolff.

"Picture books about numbers typically go from one up to 10. The idea of zero may be a bit more abstract, but this picture book communicates the concept in child-friendly terms: “Zero is . . . the balls in the bin at recess time. 0 balls,” or “. . . the sound of snowflakes landing on your mitten. 0 sounds,” or “the kites in the sky once the wind stops blowing. 0 kites.”...Nicely composed and often quiet in tone, Arihara’s gouache paintings illustrate those images with sensitivity".—Booklist magazine

"Ashley Wolff's musical text and colorful collage artwork pay tribute to the special bond between children and their grandmothers and grandfathers."