Ha! We used to have guinea pigs...my kids called them giggly pigs!
We had loads..for years! Tip...make sure you handle it regularly so it gets used to you...as clipping nails and fur if needed will be easy. They love company and will coo and squeel when you go to them. They are best in numbers...but don't mix boys and girls as you will end up with herds of them! They sometimes get on with rabbits..but be careful as rabbits can be bullies.
Pigs make very interesting pets for kids. Keep them well fed....they MUST HAVE hay to eat as well as a dry mix AND lots of things like carrots, celery and kale.
Dogs and cats aren't to be left with them.