hey hey tmalave
couple other options to look at. don't know your budget in euros.
tuscan-wine-tours.com tours out of florence, some with lunch or dinner, wine and olive oil tasting.
come&seeitaly.com different types of tours and things to do.
luccatours.com
withlocals.com put in your city and lots of different activities, some are kid friendly/family oriented.
for a day trip on your own: take an early morning train to pisa, (san rossore station) if you are planning to climb the tower book early (opapisa.it) check opening times, it will get crowded and busy. after this take the train to lucca. walk around the walled city, bike tour, enjoy the piazzas, shops, cafes, sit and people watch. check about wine tours from there. there are wineries in this part of tuscany,
frattoriaaldotto.it a short bus ride or taxi ride from lucca center.
bar pasticceria cucciolo a pastry shop near the duomo famous for bomboloni and other pastries.
mercatocentrale.com in florence. market full of shops, cafes, souvenirs
venice: camacana.com a class making venetian masks, streaty.com food and wine tours in florence and venice.
rome: oldfrascati.com a wine and food tour, 30 minute train ride from rome to the countrysides known for their white wines. maybe a pizza making and wine tasting tour for the whole family.
we did a greek island cruise out of venice few years back, walked around the alleyways of santorini, stopped for appetizers and glass of wine overlooking the port. not my favorite island, mykonos walked around seeing shops, windmills, the whitewash homes with the gorgeous flowers hanging, the doors and window frames, getting "lost", having some appetizers with ouzo sitting at beach front restaurant (little venice) and their mascot, the pelican, one of my favorite islands
hope this helps you with different ideas to think about. so much to see and do, not enough time. be prepared for the crowds and busyness, get out early. enjoy a trip of a lifetime.
aloha