Music instruments

I have a tender sound, I look like a long stick, and they blow in me to produce a sound :)

I come from Madrid, I have 6 strings, and I produce a sound when they pluck my strings with their fingers :)

I have 2 tummies, and they tap on me to produce a sound :)

I am flat, I have 1 string, and I produce a sound when they rub my string with a bow :)

I am very loud, and they produce a sound when they blow in me :)

I look like a xylophone, but I am bigger and have wood keys. I produce a sound when they tap on my keys with 2 sticks :)