Two hours.  LouLou enjoyed a nearly two hour bubble bath today while her brothers napped.  I sat on the bathroom counter top and asked her about preschool, and wondered with her about how fish breathe underwater and why dolphins need to breathe air instead...
Two hours lasted a looong time.  I even got bored, but then chided myself and tried to enter back into "being all there" rather than hurrying off to fold laundry or some lesser task than the one at hand - simply enjoying my four year old and her pruney toes.