RE: Propagating my houseplants

Yes, I've seen spider plant 'pups' too. Some plants can be easily propagated indeed. I forgot to mention my Chinese money plants that produce new plants in the same pot.

Snake plants take a bit longer I think. The Snake plant in my pot has leaves of about the same length, but I'll see how the young plant will develop.
I did hear you sometimes have to rotate your plant every now and then because plants grow towards the light.