Take the fruit, the juice of the limes (throw in the squeezed lime pieces), mint and agave syrup and muddle for 2 minutes.
In a large pitcher, combine above mixture with the sparkling water and mix well. Let sit for at least 30 minutes to allow the juices to mix.
To serve, pour over ice.
*For adult drinkers, add the vodka when you mix in the sparkling water for a refreshing alcoholic beverage.