Pebble Go - Text, images and audio
Pebble Go: US Government Topics include: Constitution, Congress, President, Declaration of Independence, Voting, Governor.
Britannica ES - Text, images and audio
Within these articles are links to other important people and topics of the time like, George Washington, James Madison, Thomas Jefferson and Shay's Rebellion, etc.
Video
BrainPop Jr. Videos related to Constitution (includes Constitution, Constitutional Convention, Bill of Rights, Declaration of Independence, Articles of Confederation, Branches of Government, American Revolution, Washington, Hamilton, Madison, Franklin)
Discovery Education
Constitution and Constitution Day - animated video, 13 mins
Holiday Facts: Constitution Day - 14 mins
Animated Hero Classics: General George Washington - 29 mins
America at its Best: American Government - 15 mins
Magazines:
Kids Discover: Colonial America
Kids Discover: 1776
Kids Discover: Declaration of Independence
Kids Discover: American Revolution
Kids Discover: Revolutionary Women
Youtube
Fun Things to Learn: The Constitution 11 mins
School House Rock: No More Kings 3 mins
School House Rock: The Declaration 3 mins
School House Rock: Shot Heard Around World 3 mins
Schoolhouse Rock Preamble to the Constitution 3 mins
Video of the book, "Shhh, We're Writing the Constitution" 30 mins
Websites
DK Find Out: American Revolution lots of other links
Constitution for Kids (some ads - may want to print it) - 11 mins
Contains Simple PowerPoint about the beginning of America and the Constitution click on link to get Powerpoint
Narrated PowerPoint on the Constitution click on link, open PPT, then play PPT
Enchanted Learning: Constitution Information and Printable Handouts