"pennywhistle." YourDictionary, n.d. Web. 08 December 2018. <https://www.yourdictionary.com/pennywhistle>.
pennywhistle. (n.d.). Retrieved December 08th, 2018, from https://www.yourdictionary.com/pennywhistle
A six-holed flute-like instrument with a fipple. They have approximately a two octave range (sometimes a little higher). Stereotypically, they are made out of tin, but in reality they come in all sorts of varieties, including tin, brass, nickel, cane, polymer, etc.
English Wiktionary. Available under CC-BY-SA license.