-Cut two slices of watermelon and divide each slice into four triangles and remove the peel from each piece. Cut the straws in half and place a straw in each piece. Melt the chocolate over a water bath. When the chocolate is melted, dip each piece of watermelon into the chocolate and optionally sprinkle with Tivoli sprinkles. Place the watermelon in a fireproof dish lined with baking paper and put them in the freezer overnight. A delicious ice cream for the whole family on a hot summer day.