Abstract: The processing of dynamical systems from
everyday life requires the development of system thinking
and the record of mathematical relations between variables,
which is known as mathematical modelling. The dilemma that
appears is how to develop the system thinking and
particularly mathematical modelling in schools at earlier
ages. In order to discuss dynamical systems, the basic
knowledge of differential equations is necessary. Therefore,
mathematical modelling appears to be applicable only to
students. The article represents a possible processing of
dynamical systems with graphic oriented computer
programmes, e.g. Berkeley Madonna, Daynasys and Stella in
primary schools. The programme packages enable the pupils
to construct a given system by linking together different
graphical objects for parameters, variables, and fluxes of
variables. Some actual examples (liquid flow) of the
dynamical systems which can be used in primary schools will
be shown in the article. In advance the examples of the liquid
flows are linked to simple mathematical models which
illustrate the object movement influenced by forces. We lay a
particular emphasis on a simple mathematical model for freefalling
objects in the air since this topic has already been
taught at physics in primary schools.