Hi, I was getting very tired of my sims constantly putting the speed of the swing on fast and then the baby getting sick on me. I went over to NRAAS and asked over there in the Retuner section. This is what somebody said. First of all go to either the City Hall or on a personal computer, then select
NRaas > Retuner > Settings > General > By Tunable XML > Sims3.Store.Objects > Baby Swing > kChanceOfQueasy > (default is 2)
I set the queasy to 0 and it works great! I just thought that I'd pass this along to others who are sick and tired of their sims setting the swing on fast and getting a sick baby.