Definitely a difficult challenge. Of classical composers, Mozart may be the most fruitful choice. Jazz can be a bit challenging for young listeners, but you can't go wrong with Duke Ellington.
Here's one from left field: the mid-20th century composer / arranger Billy May. He wrote a number of songs for cartoons: https://youtu.be/46ZCJ0Sf5hg
As well as this introduction to the orchestra for children: https://youtu.be/PyJrLz13vZo
And he arranged many songs that we would now call "world music" e.g. https://youtu.be/T7kPRvm7X34
And he wrote for a number of television shows, e.g. https://youtu.be/s66uN3An4oU