Where do Easter eggs come from?
Peppermint Patty, Marcie and the rest of the Peanuts gang are busy getting ready for Easter by decorating Easter eggs, except for Linus. Linus assures his friends that, similar to the Great Pumpkin, the Easter Beagle will mysteriously rise and deliver eggs to them. His friends are skeptical, however, and continue their shopping and decorating. In the end, when it seems all the eggs have disappeared, the Easter Beagle does, indeed, deliver Easter eggs that are decorated suspiciously like the ones Lucy made.
My Two Cents
However, a minor message against commercialism is communicated when the children visit the local mall (to buy eggs, strangely enough). Everywhere they encounter signs about sales and how many days until Christmas.
But even those sight gags are kept to the background, literally, while Snoopy dances with the girls or Sally tries on way-too-big shoes or poor Marcie tries to figure out how to make Easter eggs. The cutest bits have nothing to do with eggs or Easter, but happen when Snoopy is exploring Woodstock's birdhouse.
It's the Easter Beagle, Charlie Brown is charming, keeping away from loads of pop culture references and sticking with portraying the joys of an innocent childhood.