In reply to somethingelse:
Not quite the Roaches but the west side of Ramshaw rocks may also be suitable walk and simple scramble/climbs on boulders/rocks.
Back Forest, as mentioned above is good. Not sure what climbs/rocks suitable but don't forget to visit Lud's Church.
Alternatively, park at Roach End and walk back south to the Roaches for an open all round view. Lots of rocks near/around trig point for youngsters. (Think they may need a few more years growing before tackling the dyno on Wings of Reason)