In reply to dunnyg:
Further to this, Trewavas is generally the most popular spot for family friendly climbing in that area. Whilst it's not technically on The Lizard, it's nearby and near Helston. Trewavas is exclusively single pitch, on good solid granite - although of an unusual type - and is for the most part right next to the coast path. As an added bonus there's large gearing up areas both above and below the climbs, also ideal for just lounging about. Most of the climbs are far above the sea, but there are a handful of decent outings at sea-level which have been done in the course of writing the chapter up for the guidebook, so feel free to email me if you want further specific information; otherwise there's plenty of existing routes detailed in the CC guide and a handful in the Rockfax guide. Trewavas probably gets the best of the weather relative to other crags in this part of Cornwall, there's also beaches nearby.
HTH,
Tom