How do i make one of those ninja things that when you throw them on the ground they emit smoke?

Question

same as the title, and i dont want them to make just a little smoke i would like them to make like smoke to cover 5 square feet just enough to make your escape unnoticed.

Answer 1

I think the modern equivalent of what you're describing is a smoke grenade. See the links below (or you could always google "smoke grenade" or "smoke bomb") for details.

http://chemistry.about.com/od/demonstrat...

http://www.youtube.com/watch?v=kwgY2GzyO...

Be forewarned, if you do decide to make these, there could be dangers involved.