>>Can you please suggest some props/devices to teach very
>young deaf children (4-7 years old) the concept of intensity.
> I have some ideas like dim light to very bright light and cold
>to very hot. Any ideas on other different props I can use to
>teach this concept via visual or touch.
>How about using a speaker (woofer) driven by a signal generator/amp
tuned to the speaker's resonant frequency. The change in the
displacement of the diaphragm could be observed as well as the feeling
of the sound at different levels.