Italy is home to several theme style amusement parks, with the largest ones located in the north. It isn't Disney, but they do make for an excellent "day off" from sightseeing. Among them

Minitalia Leolandia is culture and amusement for visitors of all ages in a convenient location accessible by north Italy’s A4 Highway, Capriate exit.
Amusement awaits the entire family with 30 rides that boast adventure, adrenaline or just plain giggles. See fantastic live shows and you can even meet Leo Monster in person.

Zoom Torino: Bolder Beach is an oasis of relax and fun surrounded by the  ZOOM  biopark, where you can learn about the animals housed and their habitats. The pool is also suitable for children, who can play on the sand and on shore, or enter the Ranger Camp, a fun area with swings, walkways and other games.

Gardaland, in the Lakes Region, Italy's largest amusement park with rollercoasters, themed attractions and water rides.

Finally there is not a better place where you can have fun with your family,  or challenge your kids than on a bowling alley…So, let’s go bowling tonight!
King Center and Play City: unfortunately their web sites have not an English version, but we will be at your disposal to get more information.