Fraction Squares or Circles.
Learning toy, geometric division of square or circle.
Somewhat hard items to describe. Manufacturer claims these to be suitable for children and learning challenged, i must confess these were quite helpful for me too.
Pizza or square, divided in equal parts in different ways.
These are ought to teach the division of flat area, or something else needs to understand quantum theory.
Suitable for chidren over 8
Smart thing to own.