Ok, so I've read about this and it's still kinda fuzzy for me. Can you explain how it works? Because, we do in fact have a baby of our very own, so we wouldn't even have to borrow one from a stranger!!
There was a VERY detailed thread about it before, but I cant seem to find it now.
We all had the same FPs for every park but Epcot, so our 6 year old could ride everything twice. but with Epcot's tiering system we did this:
I got FP for soarin, DH and DS6 got FP for test track.
At their FP window, we all went to the FP line and asked for a swap pass for me, who was staying off with the 2 year old.
DH and DS6 rode Test track.
After they got done with TT, we went to Soarin where I had a FP. We all went to the FP entrance and asked for a swap pass for DH.
I road Soarin alone. When I was done, DD and DH6 got to ride with the swap pass, using the FP line.
when they finished with Soarin we hiked it back over to Test Track where DS6 and I got to ride, in the FP line, with the swap pass.
The paper swap passes are good for 3 people, and can be used anytime (I think ours were good for a week?).