well, i can think of a lor of schematics.....try using a counter set to 6 stages, then use diodes to decode the dice....
or use a counter and 7 segment display.....
the concept is to make a counter wich would go trough the 6 numbers fast enough and stpop it in some position......
if u use 2 dices, make sure not to use the same source for the pulsing signal, if u use 2 oscilators, made from a singe ic, like nand gates or whatever, make them so that they have the frequency a littile differents so they wont sincronize.....
i have some chematics, in case u dont find anything on the net, and anice ting that makes the sound of a dice.... **broken link removed**
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and this i think is the simplest **broken link removed** http://elektronik.kai-uwe-schmidt.de/digital_wuerfel_en.html
hope i helped somehow