Sensory development, activities and stimuli are extremely important for young children's optimal growth and development. Sensory integration development is one the fundamental neurobiological activities of young children that represents the basis for learning and presents a very important and actual research field in contemporary science and practice today. At the same time, the educator role and the sensory activities and tools use are extremely important external stimuli for the sensory integration development. Considering very small amount of scientific studies in this research field, especially research’s made by preschool educators working with early age children in everyday regular preschool class, this study was focused on testing the implemented sensory activities and stimuli in everyday teaching with early age children. Based on that study aim, a comparison was made between two early age preschool groups, the one that possesses all mentioned stimuli and the one that does not, so that the wellbeing for children's development could be determined. Generally, it was determined that there are significant differences between control and experimental groups of children due to application of sensory tools and materials in the experimental group of children. Since, there were no significant differences in all elements of sensory development, just in some, the discussion was based on the optimal conditions of sensory integration and on the development of new adequate measures for its measurement.