The whistle. It's called an irish whistle, tin whistle, pennywhistle. It's inexpensive (depending upon the model you choose) and easy to learn a few slow songs on it right away. It is important to learn proper fingering, which is that you use the three middle fingers of each hand and the right hand is on the bottom. There. A lot of music can be found online, printed in a format showing the holes instead of musical notes. It has about two octaves which you get by blowing harder for the higher one. The best starter models, in that they are cheap to buy, easy to find (most music stores seem to have a couple of these around), and produce a reliable clear tone, are the Clark Meg and the Clark Sweetone. They're about the same, only the Meg is about $4. A good web site if you wish to look into it is:
www.chiffandfipple.com
There's also a lot of humor on this site. I like the instrument because of its ease in playing and taking it along with you(except on planes). A warning, though: never let a kid play one unless they sit while playing. Nasty injuries have occurred from kids falling while playing (yech).
If you choose the easy and delightful kazoo, try the Kazoobie online store. Good kazoos and good customer service.
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