kids grow out of 'em; same way they grow out of pokemon, barbie, lego...
we have a few medieval clay examples kicking around somewhere; the kid never plays with them, they've just gone into storage with the other detritus on a mantlepiece or windowsill

"Carol Serr" <[log in to unmask]> schrieb:
> What I don't grasp...is how do perfectly Good marbles end up in the
> trash (we dig up)?  Did parents throw them out so kids wouldn't play
> (gamble) with them?