Grover knows all about force. Grover uses force every day and is a force expert. What? You don't know what force is? Force is the pushing and pulling you use to move things. When do you use force? Subscribe to the Sesame Street Channel here: http://www.youtube.com/subscription_center?add_user=SesameStreet You can catch Sesame Street in the morning and the afternoon, weekdays on PBS. For more fun games and videos for your preschooler in a safe, child-friendly environment, visit us at http:/