The most famous "mocktail" for kids is arguably the Shirley Temple. This fizzy, sugary concoction of soda and grenadine is served in a highball glass just like mom and dad use for their adult beverages. The child actress the drink is named after claimed it was invented at the Brown Derby restaurant in L.A., though differing stories exist about its inception.
A Shirley Temple is made by mixing grenadine with lemon-lime soda and ice and garnishing the glass with a maraschino cherry. Traditionally, ginger ale might have been used as the soda of choice, with orange juice added for extra flavor, as well as a lemon or orange slice for an extra garnish, though this isn't common practice in the modern age.
The proper way to make a Shirley Temple is to fill a highball glass with ice, add a tablespoon of grenadine, top it with lemon-lime soda and mix with a straw or cocktail stirrer. The garnish is added to the rim of the glass after stirring. The grenadine gives the drink its red color and significant cherry flavor, as well as that extra sweetness that kids crave.