A mono-print is basically a printing technique that can only produce one print; no two prints are ever alike.
There are many processes for creating mono-prints. In this case we started with a piece of parchment paper taped to the table. A small amount of paint (about 2 tbsp) was smeared evenly across the paper. Then the children used Q-tips to draw in the paint (similar to using a stick to draw in the mud.) When their pictures were complete, we pressed a sheet of construction paper on to the paint to create our image. The paint was then re-smeared evenly to create a totally fresh canvass.