In reply to SurferSi:
The main block on Hound Tor (on the left hand side of the avenue) is the most popular place to top rope kids and beginners. Top Hat around the back is also good fun.
Leigh Tor on the way to Poundsgate has some great top ropes for kids on face facing the trees (ie facing the approach path as you arrive). It's also a lovely picnic spot. But get there early as there's only room for about four cars and it's used by walkers.
The big slab at Bonehill is good for too roping kids and there's lots of scrambling around.
I took my 10 year old son to Irishmans Wall near Belstone after lockdown eased. That has some great little top ropes for kids and is in a nice location looking across the high moors (many happy Ten Tors memories). To avoid Belstone just after lockdown easing, we walked in from a car park off the 'ring road', crossing Culliver Steps which we enjoyed.
I also took my son to Sheepstor a few weeks ago but don't think I would again (although he wants to top rope Mushroom Wall again). The easy climbs are very polished and not particularly pleasant and he enjoyed Greator more.
Greator was nice - Juggular, Cheese Greator and Greator Garbo were good top ropes for my son. But the ferns are a bit high now and the paths along the bottom of the crag require a bit of scrambling. That said, the walk and scramble over the top of the two parts of the tor are really good fun.
Arch Rock at Cheddar has a few easier routes but if you don't have a belayer a you'd have to ab to the lower off from the top. I know Cheddar's not Devon but I can get to Brean and Cheddar from Exeter as quickly if not more quickly than getting to Berry Head, parts of Dartmoor etc.
The easy routes on the left hand side of the Cuttings are some of the worst I have ever done. They all seem slopey and are desperate for the grades, perhaps due to their height.
Have fun!