A steel ball bouncing on a polished steel mirror illustrates a highly elastic case; the ball will bounce for a considerable time.
With another piece of apparatus balls of different materials can be bounced on steel. Some (glass, steel) are highly elastic, and some (wood, lead) are highly inelastic. The bounce height can be measured approximately with the apparatus.
Nine basic crystal lattice models [1] are available including face-centered and body-centered lattices [2] and Bravais lattices [3].
See Imiscible Fluids [4]. Four immiscible fluids float one above the other - mercury, carbon tetrachloride, water, and naphtha. Small masses - aluminum, plastic, hardwood, and balsa - lowered into the fluids float at the four interfaces.
A face centered
and body centered lattice are available.
Bravais demonstrated that there are fourteen different point lattices, shown below in a sketch and photograph.
The following basic crystal lattices are available for demonstrations.
Links:
[1] https://demoweb.physics.ucla.edu/node/325
[2] https://demoweb.physics.ucla.edu/node/326
[3] https://demoweb.physics.ucla.edu/node/327
[4] https://demoweb.physics.ucla.edu/node/306