Hello Kenneth,
One needs to know if this sleeping difficulty is a recent development. Is it a chronic, infrequent or a periodic occurrence? Does he sleep well once he goes to sleep or does he awaken during the night and have difficulty falling back to sleep?
Tapping for sleep problems is quite effective. Sometimes just tapping for 'I choose to fall asleep easily and quickly" for a few rounds often does the trick. This boy may have things weighing on his mind. They may be seemingly insignificant to us or he may have some very serious core issues that need addressing.
To paraphrase the tenet of Occam's Razor, "All things being equal, the simplest solution tends to be the best one." I suggest looking for the obvious or simplest and working from there.
Food for thought.