The first thing that sprung to mind, among others, was the 19th century dry stone boundary wall that marked the border of the Tuggeranong and Yarralumla stations. The remnant of this wall hides between the Tuggeranong Town Centre and the Murrumbidgee River. I took some amateur video in August 2011.
There are 3 ways of viewing it 1) the walk down the beautiful Murrumbidgee River from Pine Island (north) which will meander down a track to the re-construction end near the river, or 2) The walk down from the Tuggeranong Lake dam wall, or for a quick peek... park at the Tuggeranong swimming pool, cross at the lights, near the Athlon drive road markers, and view the original section over the fence.
That's just one educational and cultural Canberra thing you can do with children in Tuggeranong...