Sir Cumference and the Dragon of Pi: An Enchanting Tale of Love and Magic

Hope5253: My grandson's birthday is 3-14, Pi Day. He just turned 4 and I think he'll eventually 'get' what that means. I bought this to add to their home library. The 'story' was good enough to hold his attention this year, but I'm sure he was lost on the Pi part. Books are great gifts, His birthday will always be Pi Day, but the 'background knowledge' he brings with him when he hears or reads the story will always enhance it

United States on Apr 21, 2022

EALowe: We're a family of geeks and we have a brand-new granddaughter, so we're always looking for books for her. This book introduces the concept of pi to kids. The names are what I like best, though: Sir Cumference, Lady Di of Ameter, their son Radius, and more. The book doesn't talk down to kids, but it's not overly complicated, either. We love reading it to her.

United States on Dec 29, 2021

Claire B.: Then let me assure you that this book is totally worth of buying. If you happen to have a kid who is curious about math beyond their basic school material, and or who learns at the rate faster then the speed of their math curriculum then get the book! Totally worth it!

United States on Jul 16, 2021

WT: Purchased this book in preparation for Pi Day while homeschooling my 5 and 7 year old. Geometry is a little advanced for them, but I didn’t want them thinking it was “pie” day. This book was a perfect adventure to get them to understand the concept enough that we’re having fun and I’m not totally botching my kids’ education. I’m also going to copy their technique used in making pies with my kids on 3.14

United States on Mar 12, 2021

L. Jenkins: The Sir Cumference books are amazing. My 9 year old and 5 year old both enjoy them (though the 5 year old is a little young for some of the mathematical concepts just yet). I myself understand pi better since getting this book! I have a grade A at gcse maths but never was taught what pi IS in terms of the relationship between the circumference and the radius.

United Kingdom on Jan 24, 2021

val: Love this book, great for teaching geometry

Canada on Aug 13, 2020

Mumonamission: Fabulous book. Bought it to introduce pi in a fun way to my 11 year old. However my 6 year old loves it too. Who could resist dragons and knights? The story is nicely written with the hero having to complete math problems to save the day.

We will be buying other titles in this series for sure.

United Kingdom on May 16, 2017

Pbc: Superb how it explains. My 7th graders loved it.

Canada on Feb 28, 2016

Auguste Dupin: My kids enjoyed this book, and they will never forget 3 1/7 as a great approximation to pi (I hope). The plot is very similar to the Pixar film BRAVE. Are both stories based on the same story or legend?

United Kingdom on Aug 13, 2015

Scott Henson: Having prepared myself for rejection, ready for rebuke for shoving math down her throat, I was rather amazed how my almost 8-year old granddaughter took to these books. Illustrations are nothing special, but effective. The child loves the punny names of all the characters. I now think she'll understand the concepts radius, diameter, circumference, pi, for the rest of her life.

The child is only just beginning to learn her 2x, 3x multiplication tables, but she became so good after reading this book at thinking of circles in terms of Pi = Circumference divided by Diameter, I somewhat regretted that Knights of Angleland used angle measurements in degrees instead of radians. A missed opportunity. Because of this book, perhaps the first mathematical formula she truly understands is Circumference (read: Sir Cumference) = 2(Pi)(Radius) or (Pi)(Diameter). Using radians (Radius is Sir Cumference's son) as the angle measurement would both prepare kids for basic trig and allow for endless punning opportunities. Oh well ... maybe later in the series after old Sir Degrees passes away ...

Even so, she liked it a lot more than I expected and it taught the material well. Hit right...

United States on Jun 10, 2014