Go to the grove of temples. Then go into the first temple. The musical one. Go all the way to the right and you will find free reed flutes.
Apollo's Temple. Once you get inside, keep walking to your right until you see the free flutes.
in the music temple go right
You blow tune on reed pipe
Blue-Green-Yellow-Blue-Red-Green
In order to minimize the download times from the servers, there is little sound on Poptropica. The exceptions include the reed pipe (flute) on Mythology Island, the phonograph recording on Time Tangled Island, and some limited sound effects.
First get the flute, or reed pipe, and learn the tune to put Cerberus to sleep. Then get the pomegranate's, offer them in the temple of Hades, fall down the abyss in the next room, get a ride across the River Styx's, play the tune on your flute, and grab the whiskers.
blue blue green yellow yellow red blue green
Go to the right of Main Street, to the Grove of Temples. In the Temple of Muses in the Grove of Temples, you can get a free reed pipe (flute) from the display to the far right. You play the notes by pushing the colored holes : blue, green, yellow, or red. Go to the statue of Euterpe, muse of music, and she will teach you the song to lull Cerberus. (blue-green-yellow-blue-red-green) You will also need the reed pipe to enter the lair of the Minotaur (it has a musical lock that can be opened by playing blue-blue-green-yellow-yellow-red-blue-green).
flute has no reed
From Apollo's temple.
a Flute does not have a reed so it's neither a single or double reed instrument.
You can get the reed pipe (flute) from the Temple of Muses. Stop at the statue of Euterpe to learn the song to lull Cerberus.
The Minotaur is in his lair on the left side of the Garden of the Sphinx. You will need the reed pipe (flute) to open the door.