"Amanda Bynes is at Six Flags and she got on my ride," an onlooker tweeted

By Jodi Guglielmi
April 04, 2016 09:55 AM
WH Photography/Splash News

Amanda Bynes may have turned 30 on Sunday, but she’s still a kid at heart.

Bynes rang in her milestone birthday with a carefree day at Six Flags Magic Mountain in California. The actress rode roller-coasters and played games with a group of friends at the theme park on Sunday.

And of course, it didn’t take fellow parkgoers long to spot the star.

“Amanda Bynes is at Six Flags and she got on my ride,” wrote on Twitter user.

Another wrote that Bynes shared a piece of her birthday cake with a few of her fans.

“So apparently my niece and nephew ate @amandabynes cake today @ #SixFlags lmao.”

By the Numbers: Amanda Bynes

The cheerful outing comes just days after Bynes’ family attorney told PEOPLE the actress is “doing great.”

“She is happy and healthy and excited about the future,” said Tamar Arminak.

And when she’s not enjoying spending time with her friends, Bynes is committed to school and planning for a career in fashion, a source close to the star said.

“She is working on her own designs, which are incredible thus far. She hopes to launch her line soon,” the source said.