BKMOM said it correctly. When our kids are older, it's times such as these that they remember the "little things" that we did for them.
My oldest is now 23 and when he was around 6 yrs of age, I was working all the time to support 3 kids as a single dad. The thing that he remembers the most is when I would come home from work LATE, and maybe only get a few hrs of sleep, I would sit with him on my lap on the sofa for awhile.
Cherish your time with your kids. Like the country song goes...."your gonna miss this".