I had an ant farm when I was a kid, but it was made out of plastic and
kind'a cheesy looking.  This is something innovative (at least to me)
and involves using various light sources to get the ants to build a home
out of gel.  This 7 day timelapse shot of a gel ant farm posted by BLeeDPhotography on January 20, 2012 is quite interesting:

For more cool animal videos, click here!