3 year old working with a trinomial cube, which is the concrete representation of the algebraic formula (a+b+c)3

4 year old grading color tablets from lightest to darkest.
3 year old mixing primary colors with the goal of creating secondary colors.



"The first essential for the child's development is concentration... He must find out how to concentrate, and for this he needs things to concentrate upon... Indeed, it is just here that the importance of our schools lies. They are places in which the child can find the kind of work that permits him to do this."
Maria Montessori
3 year old working with the short bead stairs.