This year marks the 40th anniversary of McDonald’s first-ever Happy Meal, the kid’s delicacy that helped the franchise achieve fast food royalty.

According to retail data tracker Sense360, roughly one in every four orders at McDonald’s includes a Happy Meal. Every Happy Meal has either a hamburger or chicken nuggets, a side like french fries and a drink. And of course, a toy which has become collector’s items!

McDonald’s is celebrating their anniversary by re-releasing some of their most popular toys over the past four decades. You can expect to see Ty Beanie Babies’ Patti the Platypus and the Tamagotchi. And the fun doesn’t stop there! between November 7 through 11, McDonald’s will sell a “Surprise Happy Meal” in 90 countries that will include the retro toys.