Remember that Jeddah is located on the Red Sea with the 2nd best coral reef in the world. There are plenty of water sports located in enclosed beach resorts.
The city has countless restaurants and shopping malls, not to mention, ice skating, bowling, golf clubs, football clubs, rugby clubs and hopefully a microlight/skydiving club by the summer.
For the kids there is T-ball, softball, baseball, scouts and a whole range of school arranged activities.
Boredom is not an issue provided that you have a little bit of imagination, patience and a sense of humor.
Cheers
Mutt.