I feel you completely. The children brought me joy that no way I can express how grateful I am. They made me realized experience can only be, well, experienced. No amount of describing can imprint the experience onto anyone. Now I empathize much more with co-workers when they seem oblivious to some solutions. Right now the children are asleep. I tried to catch up some articles or to prototype some something. But hey, no more focus juice left at all :)
You'd think nap times would help, but due to a combination of being zonked from the morning shift, and the mild anxiety that you need to take advantage of this nap time to relax, you end up just staring at a figurative wall for 2 hours.