It's another harmless slice of life strip.
Panel 1: That's because we got Elly gushing about Liz's first steps on the phone to Marian. This is reassuringly normal behavior because everyone does it.
Panel 2: Everyone also tells their mother that a gift (in this case, rain boots for Lizzie) will be put to good use.
Panel 3: It would seem that they were part of a matched set because Elly says that Lizzie will also be able to wear the hat and coat.
Panel 4: Everyone also knows that, even though it's a little outsized now, Lizzie will grow into and out of her little ensemble in no time.
Summary: Nothing much to snark here; just Lynn having a camera in people's houses.