Oh boy! I can't wait for summer!
Lately, since my boyfriend and I weren't able to have all the vacation days off at the same time, we did a lot of travelling for just 1-2 days (mostly weekends). City breaks, I think that's what they're called.
One of my favorite destinations is the beach. Well, we prefer the quiet areas, events are often too loud so the lake is where we usually go (since it's also relatively close by). But, if you're looking for events and adventure, I recommend the fun-parks, there are a ton of them: Gardaland, Mirabilandia, Oltremare, Aquafan, Fiabilandia, Little Italy (Italia in miniatura)... and so many others! These theme parks usually have lots of events during the summer, especially for children. All of them have their own website and events are usually announced weeks earlier!
Also, one of the things I love lately, is the possibility to travel by train, on any Saturday, 2 people with 1 ticket. So, if you're up for a 1 day trip (to Venice, to Rome, to Florence, Naples.... any big, important, touristy city!), I recommend you take advantage of this offer. It's only available for Saturdays though, so you'd have to leave in the morning and come back on the same day (or, stay for one entire week, if you want... up to you!).