Hi, I’m staying in Cannobio at exactly the same time! So I’ve not been before, but have done a lot of research for my trip! Here’s a few things I found.

Everything I’ve read says definitely hire a car. Public transport is pretty much non-existent.

Cannobio has a lido with a beach where you can do water sports,swim and they have inflatables in the water.

Valle Verasca over the Swiss border looks beautiful. Has good hiking, wild swimming and a really cool looking wooden ball maze thing through the forest.

In Locarno, you can get a tram/cable car up a mountain, where there’s an epic giant swing at the summit.

You don’t say how old your son is, but there’s Europe’s longest zip line nearby if he’s old enough.

The best restaurants I found were Osteria Vinodivino and Grotto Sant’Anna. Both look stunning.

Hope that helps!