To my knowledge, there are no family stands/areas in the stadiums. Your kids will probably have no idea what is going on, given their age.
I think your kids will probably be more engaged in a basketball game. The sport itself is faster paced and (generally) more exciting.
Tickets, there are alot of things you can do. A more reliable place is stubhub
http://www.stubhub.com/all-tickets/?...cid=C12289x486
but you'll pay a bit of a premium for it. A bit more shady is craigslist, where you can often find brokers and sellers for games. Chances of scam go up though on CL (but on average, you'll pay less). You could also try to go to the scalpers right before the game starts, but it's a gamble. Sometimes you can find them fairly cheap (depending on the turnout), but you'll also see a high markup as well.