Approach for simple Tooltip?

Hi Friends,

I am trying to create a simple Tooltip that appears when the end user hovers over a question-mark icon providing text in my prototype.  I have tried two approaches - neither successful:

1.  I tried adding the tooltip text to the Hover State.  Fail.

2.  Tried linking to another artboard with the "Overlay" action.  This feature is beautiful, but is no hover trigger.

Any help would be appreciated - thank you.