Magic wood is fairly close but not very child friendly. Chironico and Cresciano are further but slightly better for child, but I guess he has already thought of these.
I know there is some bouldering on the Italian side of the Splugen Pass, which would be closer, but don't know anything about quality or child friendliness. It looked, when driving past like boulders on open meadows/ hillsides. Not much help really, sorry.