This is a cool little game, it isn't abandonware, but this game is impossible to find ANYWHERE, I mean, it was released when I was like 3... So the best possible place to find a working disc of this is probably the antique store or ebay, alternatively I have a link that gives you a download to the game and gives you some of the 'eggz' (pets you can play with and teach and grow)/
1) download from here
2) Scroll down to 'where to get' and click 'Here!'
3) at that page just enter the code and then hit 'GO' and a download will pop up
4) allow it to finish
5) I advice making your own directory in either C:// or C://Program Files and then extracting the downloaded RAR/ZIP in that folder. Next Use the setup and follow the prompts.
6) Extract eggz RAR
7) If you are running XP/2000/ME (not sure if it's Vista compatable) extract the XP patch RAR and you are ready to play!

I still have not found any custom eggz for this that are still working, I used to play this a long time ago and I recall the official site having them but it seems they are reconstructing.