Why do some objects feel colder when in reality they are the same temperature?

In this video pedestrians pedestrians in a park are asked why a hard drive
and a book sitting at the same temperature have a different temperature  feel to it.  The hard drive feels colder than the book.  He then takes an   aluminum plate and a plastic plate to see which plate melts ice quicker.  Even though the aluminum plate feels colder, it melts the ice quicker.  This is a good experiment to try with your students.

Eagle vs Sea Snake Video

In this short National Geographic science video, we get to take a look at how deadly and awesome some eagles can be.  This eagle enjoys reying
on sea snakes.  The video's footage is awesome showing how the eagle scans the ocean for prey with it's excellent vision, and then in a single swooping attempt it can pull the snake right out of water.  This would be an excellent video to show during a unit on predator and prey relationships.

Eyes on Mars Video

In this educational video, scientists from Arizona State University, discuss a little bit about the red planet, what we know about it, and how we go about studying it.  Great introductory video for those studying Mars.