Kinetic sand

My mother gave the kids a pack of interesting sand on her way back from a trip to Wisconsin last week.  Its just a pile of sand, but its not ordinary sand.  Its incorporated with some kind of binding agent that makes it stick together.  But its not sticky.  Its more like....fluid sand.  Its packable, but it doesn't really stay in shape.  The kids find it mesmerizing to work with.  Vanessa especially loves playing with it with out Violet or Calvin bothering her during the school day.