A liquid that acts like a solid.

[Zanzier]

Surfing the vid sites and came across this. Pretty cool. Now all I need is a 4 foot deep pool, a bunch of corn starch and a cement mixing truck.

http://www.devilducky.com/media/83322/

[Brio]

They had this on mythbusters once.  It rocked.

[Wolfin]

but Mythbusters used 3 food coloring <G>

[Benggal]

You can also do this with Custard...which if properly mixed is also a non-Newtonian fluid.

[papalovebear]

oOooOo fun

[Tenkou]

friggin awsome, just don't stop in the middle of it hehe