L1: Pendulum wave, Plastic
displacer, Mechanical wave
drivers
L2: Whistle, Recorder, Singing
bowl, Decibel meter,
Standing Wave String,
Slinkies
L3: Xylophone, Resonant
boxes for tuning forks,
Band-aid speaker, Falling
bead wave, Straws, Tuning
forks, Mallets
L4: Wave demonstrators
L5: Sound tubes, Organ pipes,
Sliding organ pipe, Glass
singing tubes, Large sewer
pipe