SOUND

A teacher's pack of 6 includes:

  6 full color readers
  6 Edison style phonograph assemblies
     (6 phonograph bases with switch decals,
      6 reproducer assemblies, 6 pre-mounted needle assemblies,
      12 diaphragms (6 copper, 6 plastic),
      18 weights (12 horseshoes, 6 cylinders),
      6 long metal rods, 6 front plates with switches,
      12 belts, 12 large o rings, 12 small o rings, 6 sound funnels,
      6 recording cylinder assembles with pulley ends,
      6 feeder arms, connecting wires, 12 pulleys, 6 motors)
  6 large plastic megaphones and 6 cut-out cones
  6 slinkies
  6 large Doppler-shift sound tubes
  6 kazoos, 6 balloons, 6 sets of guitar bridges
  1 internet teacher’s guide

A 12 pack includes 2 times
the quantities listed above

A 24 pack includes 4 times
the quantities listed above

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