This two-hour special from PBS discussed atoms and elements, including the development and use of the periodic table of the elements.  Periodic Table discussion begins around the 32:00 mark and includes Theo Gray, author of The Elements.  Appropriate and meaningful modern supplement to chemistry classrooms.

Robotic arms are cool, useful, and fun to make. In this video from Design Squad Nation, kids design and build controllable mechanical arms and use their "robo" arms to lift objects and to play a series of games. As they build their mechanical arms, the kids use the engineering design process, apply a variety of science concepts (e.g., levers and tension and compression), and learn how NASA uses robotic arms in many of its missions.
NOTE: Could also be used with human body systems unit.