This is a piece of music that just about everyone who is Scottish knows. It actually is a jingle for candy, called Coulter's Candy. You know how clever jingles can be? They get in your head and stay there for the whole day! Some people call them ear-worms!
This song is very basic and simple and I've made an easy piano arrangement for my students. I've also taken the liberty to change some of the words to more modern English as the Scottish brogue doesn't make sense to most 5 years olds (at least in Brooklyn, NYC!). It is also known as "Ally Bally Bee" as that's the beginning of the lyric.
I came across this song because I'm working on a soundtrack for the Los Angeles theater company Son Of Semele Ensemble who are working on a production that calls for variations on Coulter's Candy. You can hear my work in progress here.
Here's the PDF of the sheet music for Coulter's Candy. It uses my color system which you can read more about here.
In the USA, one of the most famous jingles is the Mister Softee ice cream song.
You can actually go and download the sheet music for that one directly from the company.