Hi and welcome!
Firstly, it is great that you are doing your research beforehand and not just getting guinea pigs and then finding that they aren't what you expected.
Please be aware that guinea pigs are not easy 'starter pets'; they are actually quite high maintenance with twice weekly cleaning and daily poo patrol, eating lots of hay. They require saving up for expensive vet care or paying regular insurance and they are decidedly not animated cuddly toys; they are prey animals with prey animal instincts that will need supervision when being handled and interacted with by children. One of the most common problems with guinea pigs being handled by children are freak blind jumps with bad injuries or deep instinctive defence bites from animals not used to human interaction and very much on edge and feeling threatened.
Guinea pigs also have an average healthy life span of 5-7 years - that is a lot longer than children's interest will hol; especially smaller children's. It is going to be realistically you who will want to have them and look after them for the long term unless you have a very caring and conscientious child who would thrive on looking after pets that appreciate the care.
Please take the time to read up on our information and be honest with yourself. There are far too many piggies being produced and then discarded like outgrown toys. Rescues are currently reeling them incessant onslaught from all the no longer wanted piggies from the summer now that schools are back and the pets have lost their novelty value.
We have put together an information collection that will hopefully help you to make any informed decisions whether guinea pigs are really what you are after.
Here is the link:
Quick Information Bundle For Wannabe Owners
If you want to get a better idea what issues you may be up against as an owner, our practical and very comprehensive new owner's collection may give you a more realistic insight:
New Owners' Most Helpful How-To Guides and Information
Please note that rescues will not rehome guinea pigs as Christmas presents for that reason - the next wave of unwanted pets will start quite literally within a couple of days after Christmas...
Guinea pigs are wonderful animals but they are not quite what most people expect. Forget about all the cute videos on social media - they are what humans consider cute and amusing but don't reflect reality. Please take the time to do your research and to sleep on it; you are welcome to ask any questions you have and we will answer them as honestly as we can.