I love using these to get my students into movement and dance formations -I simply hold up the sign and students quietly (or silently) move into position. We practice moving into formations at the beginning of the school year and I use these often to get students quickly to where they need to be for various activities.
UPDATED - I made them with stick figures also so you have a choice of which ones to print & use.
Here's the link to the slide set to print.
Enjoy!