I second Backyardchickens.com. So much experience, and it is busy and bustling, especially this time of year, so that anything that comes up can get several responses in short time--a good thing for a first-time chicken parent! Not a substitute for a good book, however. Beyond the usual suggestions of Storey's (I also got a lot of info from Country Living Encyclopedia), I really love the 4-H Guide to Raising Chickens. It gives a lot of good info and a lot is geared towards kids.
Our first year we bought our chicks from our friends who raised them until they were fully feathered and could do without a heat lamp. Saved us a lot of stress! Last year we raised chicks for the first time, and for several days I was a nervous wreck.