According to some pet owners, guinea pigs can be easily trained to use a specific spot as their toilet. Similarly, litterbox training is also possible. This is a page about litter box training a guinea pig.
With patience and gentleness most guinea pigs will enjoy being held. They do however, have more trepidation about being picked up. This is a page about getting a guinea pig used to people.
ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.
I've had my 2 Guinea pigs for 2 months now and they still seem new to me. I've read up on them, I get them out almost every night after school.