Ever wondered what's in toothpaste or how marshmallow Peeps are made? What's so special about those new fabrics that claim to keep you cooler as you work out? Many of the fundamental principles behind designing and making items we use every day are based in the science of chemistry. How better to learn about properties of matter, physical and chemical changes, and simple chemical reactions than through the objects and materials students use every day?
This is happening in side you, right now. This is the highest quality version of this on youtube.The Inner Life of a Cell animation illustrates unseen molecular mechanisms and the ones they trigger, specifically how white blood cells sense and respond to their surroundings and external stimuli. We have over 50 trillion cells in our body, more cells than there are stars in the entire galaxy.
The National Defense Education Program has two seasons of 5-minute videos on science and engineering topics. All of the videos are free, and created for teaching kids (middle-high school level, it seems).