Makenna Snyder, left, and Lauren Duncan use an anemometer to measure wind from a small electric fan during a COSI on Wheels program Tuesday at Celina East Elementary School. COSI's traveling program, called Current Conditions, began with a 45-minute interactive assembly introducing students to air pressure, cloud formation, warm and cold fronts and extreme weather. The assembly was followed by hands-on activities, such as students learning to use an anemometer.