@tomd
Opposite A’an is Ben Venue – although a path, there’s lots our lot used to scamble over and range like puppies off the lead.
Tarmachan ridge is interesting as hills go, ours loved it from a young age. Imo, just go up to summit then first 15 mins of ridge, after the down scramble bail into the corrie and the hydro track out.
Ben Ledi via Stank glen is another kid friendly and engaging day with different paths and feel all the way up and down.
Perthshire Vorlich similarly, and ours enjoyed the scamble up Stuc a’Chroin. Odd walk out if you don’t go back over Vorlich though.
Chonzie is not a scramble, but it’s the easiest Munro in the land! Great for a summer picnic.
Carn Liath at Blair Atholl and Ben Vrackie at Pitlochry also offer steep, short, interesting days out for kids.
Lomond is a busy but interesting and short Munro.
I’ve got more if you want 😉