The colors help emphasise the base ten nature of the number system and make it simpler for students and teachers to describe what they are doing as they can refer to the different colors.
“Hands on Learning”
This set contains 100 yellow units (1x1x1cm), 10 green rods (1x1x10cm), 10 flats(1x10x10cm), 1 red cubes (10x10x10cm).