Well, it's a digital circuit, mostly, so the caps and resistors are few.
These circuits/devices that you'll find out there today are assembled using SMT chips (surface mount technology), and you're not likely to learn a lot from dissasembling one.
You won't find the ram, or the control chip at Radio Shack, unless you use one of their BASIC STAMP kits (now in version 2, I believe). If you can put together something with that, then you should be well on your way to build a digital record/playback device.
It depends where your knowledge of electronics is.
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