In reply to Mark Bull:
Awww, poor unloved Rosyth Quarry!! On the plus side, your kids can abseil, be noisy, and light a big fire and no-one will mind. It’s also well-placed fir Edinburgh, Deep Sea World, Fife Coastal Path, Secret Bunker... Not W coast so weather/midges not bad.
Benny Beg is uber child friendly - toilets, cafe, etc.
And the Kirrie playpark is BRILLIANT!
No-one else will suggest this, but artificial boulder park Cuningar Loop is conveniently in Glasgow, FREE, and has a bmx track too! Topo online on Forestry Commission website.
And finally, there’s beach trad climbs at... Mull? Iona? (its in the Arran and Inner Hebs SMC guidebook).