Why leave them at home ?
Having a wedding in Tuscany often put bride and groom in front of a dilemma. Besides their friends and relatives, should they extend invitation to chidren too? I would say, YES !
Most people take the opportunity of being guests to a wedding abroad to turn the event into a family holiday or family break. Do not have doubts on what children would do on the wedding day. Just hire an English speaking entertainer and babysitter for the youngest and let them have their share of fun.
This will make your wedding even more memorable.