For the designated driver: Virgin Sunrise
In a highball glass, pour enough grenadine syrup to cover the bottom, then top up with your orange-flavoured fizz of choice (Fanta, Tango, or whatever else they call it in your neck of the woods). Stir just once with a straw and enjoy. Ice optional.
For the rest: Watermelon Fizz
One measure of watermelon schnapps (I like Cardinal), top up with Sprite, both well chilled. Once more, highball glass, ice optional.