Did you know that there is a complicated system of categorizing folk and fairy tales? Like, assigning letter and number codes to them, so someone can say something like "Oh, Little Red Riding Hood? That's a 73-B, juvenile travels through woods to relation, who has been replaced by wolf." Strips like this make me want to come up with such a system for jokes. This could be 13-G, kid gets tripped up by minor misunderstanding concerning meaning of word.
26-Q, part of dog takes on dual-role as inanimate object.
930-A-IV, smart kid finds clever way to remind friends they are to bring her birthday presents.
8-W, sight gag causing dog to resemble hand puppet. (Not to be confused with 8-V, dog pushed off table by irate cat. Okay, I'll stop now.)
It's easy to forget the relative sizes of the Peanuts characters compared to the world around them. The sight of the bathtub behind Patty shows just how young the kids are meant to be. Even in the early days the kids behave more like small adults than children, but the age discrepancy back in 1954 seems almost shocking to me.
This strip is almost a trope for Schulz at this time; a character gets in the way of Snoopy watching television, or vice-versa, with a sight gag showing the obstructed character restoring his view at the expense of the other.