It depends when you come, but having the the Cardinals is a very good start. The Royals, not so much..... I recommend coming to St.Louis in April and catching a ball game.
Several off road parks if your into that. Flat nasty in Jadwin,mo.Smorr in Seymour,mo,Wash!ta in Farmington, mo. just to name a few. A lot really nice state parks and several lakes. Things to do for the entire family.
Beautiful, truly excellent highways and roads and who cant resist the temptation to visit a giant Bass Pro shop that has every sporting equipment known to man, and an outlet shop where they clear out merchandise lines. It doesn't get any better!