Fun in an Airport?

Yes, it is possible. With more and more kids flying some airports are doing all they can to make the wait for your flight enjoyable for the littlest travelers.

Right now you can visit CheapFlights.com and download the Kids Airport Diversion Guide. You have to sign up for their newsletter but the guide may be worth the spam. And you can always remove yourself later.

The airports listed are large: (Airports with links are in red)
Atlanta Click fun things to do in the right column
Baltimore/Washington Intl
Boston Logan In terminal C
Charlotte Diversions but no "designated" play area
Chicago O'Hare Past security in terminal 2 check out the "Kids on the Fly" exhibit
Cincinnati/ Northern Kentucky
Dallas/Fort Worth Click on a terminal and then click the services tab. Terminals B, C & D have play areas
Denver
Detroit Metropolitan There are 7. Click the terminals for a closer view
Las Vegan McCarran
Miami Gate 35 on the D concourse has a play area
Minneapolis/St Paul
Milwaukee Click Family Care Room. There is also an aviation museum with free admission.
Nashville Lots of renovations going on here. Look for additional music stages and play areas!
JFK Go for a ride on the AirTrain
Newark Another AirTrain
Orlando Intl The entire airport is fun. Art, mosiacs, a 3,000 gallon aquarium by the food court, Kennedy Space Center Stores, the Power Arcade and a central atrium outside the Landside terminal.
Phoenix Play areas in terminals 2, 3 and 4 as well as kid friendly art in terminal 4 on level 3.
San Francisco Click amenities for the museum. The Kid's Spot in in terminal 3 near gate 87A.
Seattle
Heathrow, London

For airports not listed I've found that it is best to look under "airport services" or "customer services" and search for "things to do" or "family services". Or, if the website has a search engine, type in "kids area"or "family facilities".

Finally a reason not to dread the airport!