In my opinion, knot theory is an area of mathematics neglected in the elementary, middle and high schools. Knot theory offers the advantages that it can be visually displayed using inexpensive materials; each student can work alone or in groups and it is easily learned. After all, the Boy Scouts have been doing it for decades.
This book is a gentle introduction to the basic theory of knots, written at a level so that middle school students can understand it with a little help from the teacher. A cartoon format starring a math superheroine is used, so it is packed with easy to understand diagrams. The 62 pages of material is a complete introduction to the theory of knots and is also long enough so that a complete section could be offered. This book would also be suitable for teaching a lengthy session on using manipulatives in mathematics instruction offered to mathematics education majors.