“Learning shapes starts with Soma shapes.”

Infancy and childhood are a 'critical period' for developing spatial sense.
Even if a child is not born with an excellent sense of space, the differences in what they experience and encounter during childhood can later manifest as differences in their sense of space in the upper grades of elementary school, middle school, and high school.
Therefore, it is important to provide children with a variety of experiences during infancy and to begin systematic learning during childhood.
Somado Shapes is a geometry textbook that covers the geometry part of the entire elementary school curriculum for students from 5 years old to 5th grade.
Each level is divided into four areas: two-dimensional figures, three-dimensional figures, figure manipulation, and measurement. It is designed to develop children's spatial sense and thinking skills with topics and approaches optimized for each learning age.
If you study two chapters a day in an enjoyable way, you will naturally acquire concepts, apply them, and review them through the systematic structure of “daily learning → activity → confirmation learning.”