For the shots in the family room, I set up two strobes, both triggered through IR with a Canon ST-E2 on my 40D.
I used a Lumiquest LTp Softbox with one flash and attached it to the second-floor walkway railing with a Gorillapod SLR. (closer view)
I used a Lumiquest Softbox with the second strobe and attached that to the mantle with a regular Gorillapod. (closer view)
Also, as you may have already inferred, my brother likes to leap upward to try to reach that second floor walkway.