Somnambulistic Arabesque is a minimalistic composition. It features some use of the locrian mode. It sounds to Alex Lewis like a meandering music, hence the name.
This could be a good piece for somebody who has been playing piano for 2 - 5 years. It depends, of course, on how talented the child is, which is why Mr. Lewis doesn't like to mention age too much in his products. However, this would certainly fit under the category of easy-intermediate.