In reply to Alan M:
Birk Knott Crag
In an attempt to offer something different the above might be worth a look
It's close to parking, 5 mins for adult, and not too steep, sunny aspect, relatively low altitude, probably worth checking before visit, combine with visit blea tarn.
I don't think black crag suitable for 5year old except on a very unusual day, sunny no wind, long scar bit better routes but weather still applies
Scout Crag always popular if polished