This book might be a good present... and not necessarily for a child!
From University Science Books:
Over the years, Nobel laureate Arthur Kornberg regaled his children and grandchildren with rhyming tales of the tiny beasties in the germ parade. Arthur's poems and stories are now available for all in this beautifully rendered children's picture book. Germ Stories will bring the microscopic world to life for the very youngest readers and grown ups alike with its richly imaginative narrations and its vividly rendered art and color photos.(A Spanish translation might be soon available)
Germ Stories, by Arthur Kornberg
University Science Books