In reply to chubbyclimber:
People who have children often go to Canche aux Merciers. The boulders are not very high, the landings are good, you don't have to walk a lot, and there are lots of circuits.
Other options : Bas Cuvier or Roche aux Sabots (big concentration of problems)
Notice that you can climb in an area in the morning and climb in another area in the afternoon (because they are not far from each other).
