I do a ceramic "bells & whistles" unit with middle schoolers. The whistles
are simple to form - like the ones from South America. There's a book (can
get the name tom'w - its in back of Arts & Activities or School Arts) that
gives instructions. Basic form is pinch pot with spout and hole. Bells are a
bit easier. The finished pieces must produce a clear tone. Students have
made historic and popular characters, animals, houses, a mountain with tiny
skiers, an igloo. . .