For instance:
Yang Qin - Chinese hammered Dulcimer; came into China from Persia in the 17th century and now regarded as a Chinese national instrument. see Hammered Dulcimer.
Which is a quote from http://www.hobgoblin-usa.com/info/glossary.htm
which lists folk instruments. Probably there are other instruments with names beginning with 'y' which are not classed as 'folk' instruments.
The whistle is a musical instrument. The washboard is a musical instrument.
Tambourine is a musical instrument. Tuba is a musical instrument.
Nose flute is a musical instrument. The Nagara drum is a musical instrument.
keyboard
Lyre
· Ukulele
An upright piano.
naoline
Fife.
ukelele
xylophone
marimba. its a percussion instrument