Limber Line and Circle O Count Happy Beads!" uses the abacus/soroban format (except that the beads here are horizontal instead of vertical), and can help speed mental math calculation while improving right brain function and creative thinking ability. By coloring in circles lined up inside a rectangle, children may begin to "see" the numbers in their minds. This improves visuo-spatial brain power (important later on, for example, with driving skill). It can be fun to count, so full STREAM ahead for science, technology, reading, engineering, art, and math).