Millipedes are about as low maintenence of a pet as possible, once you get things figured out. They can be kept at room temperature, eat their substrate, and the cage only needs to be cleaned a few times a year. They're also communal and can be kept with other pedes of their own or different species, and some other crawlies like roaches.
Here's a few care guides if you're interested:
- http://www.arachnoboards.com/ab/show...pede-Caresheet
- http://petmillipede.weebly.com/
- http://www.bugsincyberspace.com/Live...pede_Care.html