Readout:tool dragging across object shows different reading, than drop over object.

[Faith82]

I am trying to find the best way to address this task. I have a measuring tool that the user will drag across the various object. Each time the user drags over an object, the display on the measuring tool will show a different number. After the correct number is displayed, the learner will drop the tool over the object then select the submit button.

Any direction or help is appreciated.

Thank you,

Faith