For a kid playing violin and kids in an orchestra - I use the term not as a negative but in awe - nearly any music or piece by Prokofiev is extremely difficult. You know him from Peter and the Wolf; that guy.
The music, in this example, is so tight and disjointed - a contradiction - that individual parts sometimes don't seem to make any sense. But they do. It is like 30 people in a room talking and all of a sudden, with each person uttering just one word, there is a full sentence and another and then a paragraph and then a short story - but each person contributes just a word at a time.
About 8-9 minutes in you'll get the idea. If it doesn't make you cry then you missed it.