Hi Natalie'sMom- I'm a big fan of raised beds. It will save you the tilling, amending the soil by guessing, and it's really great for kids. Raised beds have a nice border that keeps kids from walking on plants so makes it easier for them to help. I also worry about suburban neighborhoods and fill. Some lawns have things in them we would rather not have in our gardens. It's more expensive the first year but balances out over time.
BTW gardeners - I'm enjoying some of my onion dill zucchini chips from last summer's harvest. Just a reminder of the year round goodness of gardens

I love finding those jars in the winter
ETA - I love this design - so much space for kids to help

Of course you don't need this much at home. This was a child care center garden.