In reply to darvill683: barmouth slabs, there is the main slabs which are pretty high single pitch(~18m?), I imagine too high although climbing the bottom half of one is a big acheivement for a little person.. however you can also scramble up easily above to shorter single pitch routes, and up above that there is slabby bouldering of various heights and difficulties with grassy landings this stuff can also be scrambled to round rh side of the crag. be warned though the walk up from the parking place is very steep up hill on a road and could be hard work if you are very little and not so into walking.
also note, like lion rock there are a lot of groups from outdoor centres there on weekdays too.