Acorn whistle

A friend's son has recently mastered the art of whistling with an acorn cap. When she told me this, I remembered how my daughters used to make acorn whistles with the nut part of the acorn. They gouged the nutmeat out, leaving the shell, with a neat, round, opening up top, and they decorated the outside with patterns in nail polish. They were beautiful, and they made a clear, shrill whistle.

I thought I'd make one for my friend's son--whom I met recently, in Colorado, where I went for the Sire...