Hi kansas!
From what you said, it sounds like you only want to get a rabbit as apet. If you're not planning on showing, you do not need to get apurebred rabbit from a breeder. I would recommend rescuing a rabbit.You can find all sorts of rabbits at the rescue shelters, and if youget one of them, you would be saving a life.
If you've got your heart set on getting a purebred rabbit, then I wouldrecommend getting a medium sized rabbit, like a dutch. Your 13 year oldis old enough to know how to care for a rabbit properly, as well as tohandle them. Your 8 year old is old enough to learn what to do and whatnot to do with the bunny [Though not nessesarily care for it completelyby themself, but they could certainly help].
As the others said, some rabbits just do not like to be picked up. Itwould be like someone picking you up 3 meters above the ground. Youshould make it clear to them that for the first few days that they arenot to pick up the bunny without you being nearby. After those firstfew days [which may turn into weeks or even months], you will have abetter idea of what the rabbit is like.
Some people say that the large breeds are all completely calm, and allthe small breeds are really skittish and high-strung, but that's nottrue. I have a friend who has two mini lops, both brothers. One isneutered, and that one is really high-strung, skittish, doesn't letanyone but their owner pick them up, and doesn't even like it when shedoes. The other one is a male called Layla [that used to be a female:rollseyes], who is the most gentle and loving little rabbit you evermet. I've met tiny little rabbits that are wonderful, calm, loving, andlazy, and I've met huge rabbits that bite, kick, and run around thehouse at full speed [which isn't very fast for them].
What I'm saying is that it can go either way when you buy a rabbit. Youcan be told that Dutch rabbits are wonderful and loving and calm, butthat does not mean that every single one is like that. It all dependson the individual rabbit.
I do not know much about the long-haired breeds, but there must be someamount of shedding. That comes with getting the 'fluffy' one:rollseyes. But if you don't mind a few hairs on the sofa [or a lot],and you should look into getting a Angora or one of those sort ofrabbits.
Here are a couple of links I found while I was searching the internet:
http://www.petcaretips.net/best-rabbit-breed-pet.html
http://en.wikipedia.org/wiki/List_of_rabbit_breeds
http://www.mismatch.co.uk/rabbitbuy.htm
If possible, see if you can attend a rabbit show before you buy yourrabbit. Often you will find kmowlegable breeders there, that can showyou their rabbits and tell you about what they are like. Of course,there are many knowlegable breeders here that can tell you the samething, but sometimes it's better to see them in person
I hope this all made sense ...
Thanks!
Rachel.