Of course it is all blatant commercialism aimed directly at impressionable children and a direct rip-off of Sid & Marty Kroft's H. R. Puffnstuf, but I digress...
Ok, lets take a tour... Look closely...
Not only will you find Apple Pie Trees, The Hamburger Patch, and the French Fry Thatch with Goblins,...but you'll also see the Triple Thick Shake Volcanos, Filet-O-Fish Lake with two Filet-O-Fish, Captain Crook's Red Boat, The Golden Arch Bridge, and The McDonaldland Train. There are even directional signs on the top of large striped straws. Oh,...and up on the top of a mountain is a train tressle and a Castle (which in concept belonged to the Evil Grimace.) Yes, the Evil Grimace, he reformed later, unlike Captain Crook and Hamburgler who continued to be villainous. Finally, there is a McDonalds restaurant in McDonaldland which also serves a portal between the magical land and the real world.
Now lets meet the inhabitants of McDonaldland, shall we?
He exists to peddle fast food to the children who visit McDonaldland and to maintain relationships and interact with other characters. Being a clown, he possesses innate magical abilities and has a talent for legerdemain and prestidigitation.
At some point he lost a set of arms and reformed. He is now just a well-meaning simpleton, whose clumsy antics provide a comic foil to Ronald McDonald. He still retains his love of milkshakes, though.
He is the giggly, bumbling, and somewhat incompetent mayor of McDonaldland. He is sometimes shown to be the magistrate of the McDonaldland court when Hamburgler or Captain Crook get caught and put on trial.
As the main source of law and order in McDonaldland, Officer Big Mac spents most of his time chasing the Hamburglar and Captain Crook.
Unlike the Hamburglar, he spends his time trying to steal Filet-O-Fish sandwiches from citizens of McDonaldland while avoiding being caught by Officer Big Mac. He often translates for Hamburglar. Captain Crook uses ships and waterways as means to escape being captured.
He serves as McDonaldland's local inventor and researcher. In addition to dabbling in time-travel, he is also the creator of the McNugget Buddies.
They like to to steal and gobble up the other characters' french fries. They are also called Fry Guys or Fry Kids.
In 1976, Remco toy company produced a line of 6-inch-tall remarkably detailed action figures to celebrate the iconic McDonaldland characters.
To complement these seven figures, Remco also made a beautifully detailed McDonaldland playset. Compared to the actual studio set, Remco’s set is astonishingly accurate.
Finally here is the vintage McDonalds commercial that intoduced McDonaldland: