Flageolet
The flageolet is quite similar to the recorder. In the 18th century it changed because a narrow mouthpiece made of ivory or bone was added at the top.  This led into another section which bulged out.  There was a soft sponge at the end of this.  Sometimes this instrument was called the "flautino".  The piccolo developed from it.  Another instrument that developed from it was the tin whistle.