Creating checkable boxes w/o the check box forms tool

Not sure if this can be done. When you use certain fax cover sheets in the
Word templates, there are boxes that can be checked and unchecked with a
double-click. It incorporates a blank-box wingding that when double-clicked
becomes a checked-box wingding. I am comfortable with how to insert the
symbols (wingding characters) but not sure how to incorporate the
double-click feature. I'm thinking it may be a macro but was hoping I could
do the same thing is Excel. The check box feature on the forms menu of Excel
is too advanced for the simple task I'm trying to accomplish. Help!