Russian Academy of Education Moscow

An important direction of human cognitive development is the development of abilities at activities in complex dynamical environments containing multiple inter acting structures (Dorner, Frensch & Funke, Spector, Voss). Cognition of the inter acting structures by experimentation is the main function of causal-experimental thought (Demetriou). Usually preoperational children are not considered to have well-expressed abilities for causal-experimental thought. In the paper I describe heuristic rules for design of didactic multivariable objects stimulating preschool ers' combinatorial experimentation and causal-experimental thought, the objects designed, and several studies of the children's cognitive activity (exploratory learning) aimed at the objects and revealing their abilities to combinatorial experimentation. Participants: 623 children of 3-7 years old. It has been shown that the children successfully explore the objects containing hidden mechanical, logical and mathematical relationships by using strategies of combinatorial experimentation of various levels of complexity.