^^^^ Here, here! (and a big +1)
I just turned 40 and my youngest is 2.5. When my daughter (almost 8 ) was his age, her nap time was my nap time on the weekends (usually with he snuggled in Daddy's lap). My wife is a nurse so frequently works weekends and nights and its just me and the kids Saturday afternoon. Many Saturdays I'd like nothing better than repeat that with my son and sometimes I do, but my daughter looks forward to that time as 'daddy-daughter time.' I know I don't have that many more years left where she actually wants to spend her Saturday afternoon with her dad, so I take advantage of it every chance I can (even if we just end up watching Mythbusters, Animal Planet or Glutton for Punishment).