Our Senses
Here is a link to the recipe for Slime.
Kid's Health - The Skin the bit related to sense of touch starts at 2:17 minutes. It's not very long or detailed though.
Kid's Health - How your nose works
Kid's Health - How your tongue works.
Here is the video we watched about hearing
Here's another video about the tongue (and taste).
Sound and hearing - interactive activity
Neuroscience for Kids - the senses