[youtube]http://www.youtube.com/watch?v=-1id-gHQjbs[/youtube]

This sand is hydrophobic, it avoids water

When it is dry, Magic Sand is free flowing and cannot form a structure that holds its shape. When Magic Sand is poured into water, it has a silvery sheen and doesn’t become wet. It can be molded into structures that hold their shape under water. When the water is poured off, the Magic Sand is dry. Second video after the jump.

[youtube]http://www.youtube.com/watch?v=1nNlOj_YB6s[/youtube]

How to make Magic Sand