Click the link: http://www.sciencekids.co.nz/gamesactivities/keephealthy.html You will discover how different exercises such as walking and running can affect your heart rate. Ruby's heart rate will change as you make her sleep, sit, walk & run, watch how her body reacts to the different activities. See how her beats per minute change as she does different activities and exercises. Click on the different magnifying glass to learn about your circulatory system, how your heart works as it pumps blood around your body, why blood goes to your lungs to pick up oxygen, and why your arteries and veins are so important. When you are finished exploring, take a snapshot and record a reflection of what you have learned about the heart.