Try the money magazine website. They have a lot of useful information on choosing what is right for you. They have a Money 100 list which is a good starting point of funds to look at.
I find it most convienent to stay with one "fund family" even if you want several different funds. Different fund companies have different min investments. Most offer automatic monthly investment plans.
What is right for one person may not be right for you or your kids. Ultimately, you need to choose based on your personal risk tolerence, investment goals, tax needs, age, and budget.
One thing to look at for the kids would be an education IRA, since that will give you some tax benefit.