Wash your hands well with soap and warm water for at least 20 seconds.
Drain peaches and pineapple in colander. Add peach slice halves and pineapple chunks to a medium mixing bowl.
Rinse strawberries and grapes with cool water. Drain in a colander. Cut the stem off of the strawberries and then cut in half. Cut grapes in half then transfer strawberries and grapes to the mixing bowl.
Add yogurt to bowl and mix gently with a spoon until fruit is well coated.