Our lab uses the Affect grid frequently in our lab, but I'm not sure how to create this in MediaLab. Has anybody used this, or anything that resembles a grid as one of their measures?

Basically the concept of this is that it is a grid (9 squares by 9 squares), and participants indicate how they are feeling on two dimensions, the first is from left to right and second is vertically on the grid.

We need participants to be able to check a single square on this grid.
Any ideas would be much appreciated.