The fast food joint serves burgers, fries and meals that come with a toy for children -- all sheathed in DonMak packaging, which looks suspiciously like McDonald's.
About 500 of McDonald's more than 14,000 restaurants have made the changes with Florida, New York and Southern California the first regions to adopt the new format.
Launched by Mac and Dick McDonald in 1948, then purchased by Ray Kroc in 1961, McDonald's is the quintessential example of a business that used a price simplifying model.