Sesame Street is celebrating its 50th anniversary this year! The show was a staple of so many childhoods and continues to be popular with today’s generation of kids. In fact, a survey found that 95% of American children had watched Sesame Street by age 3. There’s no denying the huge cultural impact it has on children’s television.

The beloved show first aired on public broadcast stations on November 10, 1969. It was created by television producer Joan Ganz Cooney and Lloyd Morrisett, a vice president at the Carnegie Corporation. They spent two years researching their idea and after teaming up with Jim Henson in 1969, they developed the format that would become the Sesame Street that we all know and love today.

The show featured countless celebrities and guests through the years, but the real stars are the loveable Muppets. From the bubbly Elmo to the charmingly grumpy Oscar the Grouch, the characters represent a wide range of personalities and backgrounds. The show is also known for introducing groundbreaking topics to help children address the complexities of life. In the past 15 years, the show included a character with divorced parents (Abby Cadabby), a character on the autism spectrum (Julia), and a character experiencing homelessness (Lily).

A new and awesome infographic from PlaygroundEquipment.com highlights the television debuts of 50 of the most popular monsters. Many of the most iconic Sesame Street characters like Big Bird and Cookie Monster have been on the series since the very first episode, but some other popular monsters, like Grover and Count von Count, didn’t show up until later seasons.

Which Sesame Street character is your favorite?