I went out with my daughter (age 5) this past weekend. I got my combined base weight down to 20.2 lbs (13 kg), which while not phenomenal represents progress for me, particularly since my individual base weight would have been roughly double that, say 10 years ago.
Strawberry Camp, San Jacinto Wilderness
I don't know if any other parents out there are trying to figure out how to stay on the trail, but in the case that it may be helpful, I give you:
Backpacking with Children - A Gear List for Two
HJ