Taking the kids: To Chicago this fall [Video]

Eileen Ogintz, Tribune Content Agency

No ketchup allowed!

“Chicagoans take their hot dog toppings seriously: mustard, onions and tomato, neon green sweet pickle relish, a dill pickle and celery salt are must haves. Make sure it’s on a poppy seed bun, but don’t you dare mention ketchup,” said the signage at the interactive and complimentary SKYDECK Museum at Willis Tower, designed to enhance a visit to the famous Skydeck and Ledge on the 103rd floor.

I loved the kids’ area of the Chicago History Museum where children are encouraged to see if they can guess different Chicago smells, including hot dogs at Wrigley Field (more than a million sold a season).

And at the Museum of Ice Cream, with more than 14 interactive activities and all the free ice cream you can eat, try the hot dog flavor, complete with bun, mustard and relish. “It was my favorite,” said Graham Avsel, 11, here with his grandparents and younger …