Hello,
 
Do be careful of this odor idea --- many many people are allergic to  odors.
 
Maybe try Scratch and Sniff -- this way people can control at least a  little 
what they inhale.
A company which produces such things is
_http://www.print-a-scent.com/_ (http://www.print-a-scent.com/) 
 
Sounds should be MUCH easier!! there are lots of sounds available to  download
or you can record others (with voices too ) yourself
Tell us what kind you are considering
 
Barbara Hass, retired librarian

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