A family visit
Take a walk in the woods, climb a tor or paddle in the Plym
If you just want to enjoy the stunning scenery, enjoy the river and play with the children, Cadover Bridge is the ideal place.
There are quite a few 50 things activities that children can do here, so they shouldn't get bored. For example, they could dam a stream, search for geocaches, learn to use a map and compass, or climb a huge hill.
On sunny days, a local ice cream van visits Cadover Bridge, so you might be able to treat yourselves as well....