In reply to jooode100:
Dartmoor is just covered in tors kids that age will enjoy climbing.
What kit do you have.?
Hound tor and Bone Hill rocks on the North of the moor. Have loads of short boulder problems and easy scrambles, as well as a few routes that require a belay. May be a bit of a drive involved though.
Where will you be based?
SW of the moor there are the Staple tors are similar to Hound tor, though further from the ice cream van/car park. From the same car park you can walk down to Pew tor, that too has plenty of easy short scrambles up it.
Sheeps tor is perfect for lower grade climbs. but you need a belay on most of them. It's also about the prettiest area on Dartmoor apart from Tavy cleave, so always popular.
For a good scramble, if you don't mind a bit of bracken at the start, there is leather tor from the Devonport leat. You can use the same car park for the back of sheeps tor, though the made crag on sheeps tor is a shorter walk from the minor road to the south of it.
Plenty of other to. They should love it.
(Bring a coat)
Post edited at 14:07