Learn how to keep yourself healthy by discovering 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 heart rate exercises. 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 what important roles your arteries and veins have in the process. Keeping healthy is an important topic that kids can understand better by checking out this fun, interactive game and seeing how the human heart reacts to different activities.