One answer could be a "Kids Only" carrossel similar to, but much smaller, than our Sony 400 disc unit, maybe 50 disc, that could be manually indexed and loaded with a child-proof way of containing the discs in the loaded storage ring so the discs aren't smacking into each other during exuberant play-time.

It would have to be pretty tough, and perhaps even somewhat portable.

Are ya listenin' Axi....umm,...Mattel?