Toast 4 waffles, and tear into small pieces.
Combine 1 cup chopped strawberries, 1/2 cup canned crushed pineapple, drained, and 1 cup frozen yogurt.
Divide half of waffle pieces among 4 parfait glasses. Spoon 1/3 cup yogurt mixture over waffle pieces in each glass. Repeat procedure with remaining half of waffle pieces and yogurt mixture.