Discussion of a series of four Topware series emerged recently due to their rediscovery by The World of CD-i (where you can also see all the scans as well). As World of CD-i noted, they are VCD format. VCD and CD-i of course are related technologies, with a "CDI" root directory in every VCD I've ever gandered into.
Our patron saint Blazers came through providing the discs for preservation. You can download them here, here, here, and here.
Also with modern technology, you can just view the wonderous sites on YouTube:
Aquarium
Kaminfeuer
Meeresbrandung
Vogelparadies
