Vanilla syrup, grenadine and soda water makes a lovely cream soda.
Raspberry syrup, lime juice and a dash of pineapple juice shaken with ice and then poured into a glass and topped up with more pineapple juice is delicious and very pretty. It looks a bit like a tequila sunrise.
A teaspoon of cane sugar syrup with a few dashes of angostura bitters and soda water is lovely, there’s just a tiny amount of alcohol from the bitters. It’s quite a nice grown up drink for an older child.