These are paper-thin musical instruments that feature built-in speakers and touch-style musicality.
This is comparable to the spy kits you've seen in the movies, where 007 or another spy receives a package with passport, identification, etc.: looks nice, but literally paper-thin.
Eardrum-A paper-thin covering stretching across the ear canal that separates the middle and outer ears.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.