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Subject: Re: CD player UI for toddlers
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----- Original Message -----
From: "Jim Whitehead" <ejw@cse.ucsc.edu>

>
> For toddlers, pressing play must cause the music to start immediately,
> within half a second, for the toddler to get the causality and not press
the
> button multiple times.
Or some sound indicating that the music will start real soon now.

> As well, pressing the button multiple times shouldn't
> change the semantics, like an elevator button. No matter how many times
you
> press, the elevator still comes to that floor. The play button needs to be
> the same.
Idempotency everywhere you look...


> What would the ideal toddler CD player be like? It would immediately start
> playing a CD after it was loaded.
It'd be an MP3 player with solid state storage... instant on.



