You're a super family, so why not show off your power by dressing up as the superheroes from The Avengers? (Let's face it: Your little dude is probably begging to be Captain America this year, anyway, and who are you to turn down the opportunity to play Scarlett Johansson, er, Black Widow?)
Mom: Black Widow
Dad: Iron Man
Boy: Captain America
Baby: Incredible Hulk
Best-Halloween-Ever Tip: Don't forget the accessories -- Captain America's shield and Thor's hammer!
Check out HalloweenExpress.com for Avengers costumes and accessories.