Algodoo

Make a box by editing the 5 attributes:
-color: edit the small circle's color for the color of the box.
-size: Scale the box below using the scale tool.
-text: edit the text and text color and even text scale (leave it empty for no text)
-density: edit that circle's density.
-pos: Move that little square anywhere you want (with the move tool ofc)
Have fun