Arona, Orta, Stresa, Laveno are beautiful turistic spot. Crossing Mottarone you will find beautiful views and forest. In winter time you can also practice ski.
I like to cross the lake by ferry.
A nice tour driving you to Arona and Orta. At the top of Mottarone have Alpyland to have fun with your children but have also the best view of Lago Maggiore I know. Visiting Isola Bella in Stresa can be expensive (entrance the Villa isc17 euros/each) but beautiful.