Prepare the fruits. Pineapple: Cut the pineapple into bite-sized cubes. Strawberries: Rinse them thoroughly, hull them, and cut the big strawberries into quarters, and the smaller ones in half for bite sized pieces. Kiwis: slice the kiwi in half, and use a spoon to remove the fruit from the peel. Cut into bite-sized cubes.
Combine all the prepared fruit in a large mixing bowl. Drizzle lemon juice over fruit. Sprinkle the sugar and poppy seeds over and then stir gently to combine.