New to me is Beware of Toddler, which has been on Comics Kingdom for two years, and is based on George Gant’s experiences as a stay-at-home father.
Not above a bad pun:
The strip seems to appear only on Sundays; maybe he’s too busy with the kids the rest of the week.
Comics I Don't Understand 
Once I noticed the rhyming scheme in the first two panels of the third strip, I was very disappointed when the rhymes in the final four panels were only approximate.
P.S. I really didn’t like the fractured spelling of “Dady” in the sixth panel of the first strip (it looks like it should be pronounced as “day-dee“), but a little research showed that this is just part of the intentional “little kid” orthography, and is even the “official” name of the father character.
P.P.S. Although Beware of Toddler has only been at C.K. for two years, there are an additional three years of archived strips at the author’s original website.
This is my stepladder. I never knew my real ladder.
(No, I don’t recall which stand-up I heard that from.)
I don’t know who invented it first, but this Brevity panel was included in an OY post two years ago:
If only Hitler’s father had know his real ladder, maybe the whole world would have been spared a lot of grief…
@ larK – It took me quite a while to figure out that your comment wasn’t just random revisionist history, but a reference to the miniature mustache in the Brevity panel. Just a few weeks ago, a joke about Hitler’s parents in an ancient episode of “The Vicar of Dibley” prompted me to look up his geneology, which was both hopelessly complex (including numerous disputed details), and sickenly depressing.