Midwest - Family restaurant/sightseeing advice needed for downtown St. Louis

We've never been to St. Louis and would like restaurant recommendations for the area - we'll be visiting the Arch then the City Museum and need good, reasonably priced food for a group at lunchtime. I've read the other threads on this subject and they have info on fine dining but not casual family-type restaurants.

Also, how long should we allow to visit both of these attractions? We plan to start the day with a visit to the museum at the Arch and ride to the top. We'll break for lunch then drive to the City Museum. With adults and pre-teens in our group I'm wondering how long we would spend at the Museum as it seems to be more for younger kids.

Any suggestions or other tips would be appreciated.

For fun:

St. Louis Science Center (http://www.slsc.org/) is fun for everyone.

For food:

Just south of downtown along Broadway Street is BB's Jazz, Blues and Soups. Housed at 700 South Broadway Street in a building dating back to the 1800s that originally was Phil's Hotel, BB's provides good food, a well stocked bar and live music from some of the best local blues and jazz artists.

Just down the street from BB's is the Broadway Oyster Bar at 736 South Broadway. Just as the blues of St. Louis took musical influences from New Orleans, Broadway Oyster Bar takes it's food and atmosphere influences from the Big Easy. The Cajun and Creole food and cozy interior is good, but it is the exterior that is the best part. Voted the Best Outside Dining by the AOL City Guide (2004), the patio at Broadway's is a great place to eat and drink under the stars and listen to blues and Cajun music. Oysters, fried alligator and a washboard solo by the zydeco trio playing on the patio, it's the French Quarter in St. Louis.

If neither of those appeal, just north of the arch you'll find Laclede's Landing, which is a nine-block area that originally housed industries and warehouses, but has now been transformed into a tourist area with historic touches like cobblestone streets and horse drawn carriages. There are tons of restaurants in there.

I'd recommend Crown Candy Kitchen. It's a St. Louis institution and very affordable.

http://www.crowncandykitchen.com/

Thanks for the responses :)