It is the summer of 1899 in central Texas, it is too hot to move, and an eleven-year-old girl notices that the grasshoppers in her yard come in two colors. The yellow ones are big. The green ones are small. She wants to know why.
Nobody in the house takes the question seriously except her grandfather, who is old, unsociable, mostly hiding from his own family, and the only person around doing real natural history. He does not tell her the answer. He hands her a notebook and tells her to go and watch.
That is the first handful of pages and it is also the shape of the whole book. Calpurnia Virginia Tate has six brothers, a mother who intends to turn her into somebody's wife, and exactly one adult who treats her curiosity as a legitimate thing for a person to have. It was named a Newbery Honor book.
The science it actually teaches
This is why it sits on our Stealth Science shelf, and this one earns the spot more squarely than most novels ever will. Your child thinks they are reading about a girl and her grandfather. What they are actually being walked through is how a naturalist works.
Start with the grasshoppers, because the answer is the real thing. The grass in a Texas summer has gone yellow. A green grasshopper sitting on yellow grass is visible, and a visible grasshopper gets eaten before it has time to grow large. The yellow ones are bigger because the yellow ones live longer. Callie works that out from watching, in her own yard, with no equipment at all. That is natural selection, stated correctly, arrived at honestly, and most adults could not lay it out that cleanly.
Then the method underneath it. She keeps a field notebook, and the book takes the notebook seriously: dated entries, sketches, measurements, and the question written down before there is any answer to put beside it. That habit, writing the question first, is the single most transferable thing in the novel. It is also the difference between a child who collects and a child who studies.
Her grandfather gives her a copy of Darwin's Origin of Species, which in 1899 is a forty-year-old book, hard to lay hands on in a small town, and still something people argue about at the dinner table. She reads it. She does not understand all of it. Kelly lets both of those be true at once, which is exactly right.
There is a microscope, and there is river water under it, and a jar of what looks like nothing turns out to hold a crowd. There is a plant that might be new to science, pressed, labelled, packed and mailed off so that somebody with more authority can rule on it. Then there is the wait, which runs on for months, because that is what the wait is actually like.
A child who finishes this book knows what natural selection is, what a field notebook is for, and what people mean when they say a thing has been identified. Three real pieces of science, none of them delivered as a lesson.
The child it lands with
The one who asks why and will not accept "because it is." The one who already has a notebook, or a shoebox, or a windowsill lined with objects nobody else in the house is allowed to move. The one who got told to go play when they asked a serious question.
It lands hard, too, with a girl who is quietly working out that other people have already decided what she is going to be. Callie is being trained to cook and sew and marry, she does not want it, and the book never pretends that her wanting is enough to change it.
One place to stop and talk
Stop when the plant goes into the mail, before any answer comes back, and ask a plain question: what happens if they are wrong?
Children assume that finding something new is the thrilling part. It is not. Callie and her grandfather have to hand the thing to strangers who may well say it is a common plant somebody named forty years ago. Sending it means agreeing to be corrected, and that is the part of science that never fits on a poster.
What to know going in
This is a gentle book, and the honest cautions are about fit rather than content.
It is slow on purpose. No plot engine, no villain, no countdown. It is a year in a family told in small pieces, and a child who needs a story to pull them forward will put it down at chapter four. That is a reading-taste problem, not a reading-level problem, and the two get confused constantly.
The ending does not hand Callie what she wants. She wants a life in science, 1900 does not offer her one, and the book closes on a wish instead of a win. Some children find that quietly devastating. It is also the truest thing in it.
Animals die the way they die on a working farm. The children raise turkeys, name them, and the turkeys are killed and eaten at Thanksgiving. If you have a tender child who names things, know that page is coming. There is alcohol in the house as well, since the grandfather distills liquor in an outbuilding and drinks it, written as an ordinary fact of the man rather than as a problem to be solved.
Where to get it
Of the two Calpurnia Tate novels, this is the one to buy first, and for plenty of families it is the only one they need. The Evolution of Calpurnia Tate is $9.99. Read it aloud if you can, because the slow pace that makes a nine year old set it down alone works fine at fifteen minutes a night with somebody else holding the book. It anchors the Stealth Science shelf.
If your child liked this one
Books we have written about that sit close to this one, by reading level and by subject.
A Squirrelly Situation: When a Wild Baby Comes Home
A Squirrelly Situation by Jacqueline Kelly
Grade 4 to 7
Counting Sheep: A Birth, a Broken Wing, No Vet
Counting Sheep: Calpurnia Tate, Girl Vet by Jacqueline Kelly
Grade 4 to 7
Emi and the Rhino Scientist: How One Calf Happened
Emi and the Rhino Scientist by Mary Kay Carson
Grade 5 to 8
Browse every book we have written about by age, by kind of book and by subject: Find the right book for your child. Or see the whole Stealth Science shelf.
