Where can I find technical information on hexaflexagons and other flexagons?

Here are some references on flexagons:

Martin Gardner, Flexagons, Scientific American (December 1956)162-166.
Martin Gardner, About Tetraflexagons and tetraflexigation,
        Scientific American (May 1958)122-126.
Martin Gardner, Hexaflexagons, The Scientific American Book of
        Mathematical Puzzles and Diversions, Simon and Schuster,
        New York: 1959, pp. 1-14.
Martin Gardner, The 2nd Scientific American Book of Mathematical
        Puzzles and Diversions, Simon and Schuster, New York: 1961,
        pp. 24-31.
Madelin Jones, The Mysterious Flexagons, Crown Publishers, Inc,
        New York: 1966.
Margaret Joseph, Hexahexaflexagrams, Mathematics Teacher,
        44(1951)247-248.
Joseph S. Madachy [Editor: "Madechy" in the original], Mathematics on
        Vacation, Charles Scribner's Sons, New York: 1966, pp. 62-84.
T. Bruce McLean, V-flexing the Hexahexaflexagon, American Mathematical
        Monthly, 86(1979)457-466.
C.O. Oakley and R.J. Wisner, Flexagons, American Mathematical Monthly,
        64(1957)143-154.
Sidney H. Scott, How to Construct Hexaflexagons, Recreational
        Mathematics Magazine (December 1962) 43-49.
Roger F. Wheeler, The Flexagon Family, Mathematical Gazette,
        42(1958)1-6.

The definitive reference is Oakley and Wisner.

-- Stanley Rabinowitz <stan@alliant.UUCP>

[ Editor: the question also asked about kaleidocycles; no references
on them were given. ]