An inexpensive fipple flute WordNet 3.0 & Open English WordNet

The tin whistle, also called the penny whistle, is a simple six-holed woodwind instrument. Wikipedia

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. Wiktionary

Instrument. Wiktionary (translation)

A small, high-pitched metal whistle with six holes that is blown using a fipple. Wiktionary

Small, high-pitched whistle. Wiktionary (translation)