...and plan ahead: another car-free day for Milan is planned for Sunday, the 17th of November (and nice weather has been predicted at least for Saturday, yeah!)....More......
castle exhibits page in Italian. (For grown-ups, there's also info about the black-and-white photo exhibit at the castle, too.)
web site also has a "How to get here" page called "Come arrivare" (at least the maps will be intelligible), or a free number to call, hoping someone will be able to spit out a little bit of English: 800-126-970 (yes, there are only 9 numbers). The site itself is kinda fun: the kids can click and drag stuff around the center's building gussied up as if it were a medieval castle and, if they/you register, they will be able to vote for their favorite game.
You'll have to decide if your kids literally can stomach "The Body Worlds" exhibit at the Fabbrica del Vapore across the street (not coincidentally?) from the Monumental Cemetery. I *think* it's an exhibit of the preserved bodies, stripped of their skin, of real people who donated themselves for this...but I'm too squeamish to look into it any further. Might be educational, though. I don't see any info about it on the Fabbrica del Vapore web site, so here's The Body Worlds web site...in Italian. Beware...you might leave never wanting to eat meat, again...you have been warned.
"MilanoMese," the free publication with a rich rich list of things to do in Milan is...may I have a drum roll, please...now available as a free app! Go here for an overview in English, or go to the English-language tourism home page of the Province of Milan, and download it (there apparently are a few choices of formats...I'm still a bit behind the times, so I can't test it out for you, yet).
While you're at it...another big drum roll, please!...there also are free augmented reality Jeco tours available for your smartphones (and soon for androids) for Milan and for the Idroscalo. You'll first need to download the free Jeco Guides app from the iPhone store. Once you've downloaded it, if you want the one for the Idroscalo, just search on that term. If you want the one for downtown Milan, search on "Nel cuore di Milano"...and have fun!
Hungry with all that activity? Milano Restaurant Week...top eats for a flat E. 25 (including a whole whopping 1 Euro to charity, gee, guys, how generous of you...)... lasts until the 18th of November. I found info in--sigh--Italian.