Combine sugar, light corn syrup, boiling water, vinegar, and red food coloring in a saucepan.

Stir the mixture until the sugar dissolves completely.

Cook the mixture over medium heat until it reaches the hard-crack stage (300°F on a candy thermometer).

Remove the saucepan from the heat.

Stir in butter and a dash of salt.

Allow the mixture to cool slightly until it thickens a bit.

Prepare greased baking sheets with wooden skewers spaced 5 inches apart.

Quickly drop spoonfuls of the sugar mixture over the skewers to create lollipops approximately 3 inches in diameter.

Add fruit-flavored hard candy circles to make faces on the lollipops.

Let the lollipops cool and harden completely before serving.