Sensory Activities for Preschoolers With Down’s Syndrome. Part of the series: Activities for Child Development. Sensory activities for preschoolers with Down’s Syndrome can include manipulating sand, painting and putting things together and forming lines and circles. Find out about great sensory activities for preschoolers with Down’s Syndrome with help from an expert with more than 30 years of experience working with children and adults with disabilities in this free video clip.