PHILADELPHIA (CBS) — What does a superstar country singer do on the weekend when she’s not performing on stage? When she’s in the Philadelphia area, at least, she spends it with her family at a children’s theme park.

Carrie Underwood, in town for a concert in Hershey on Saturday evening, spent the earlier part of the day at Sesame Place in Langhorne, Bucks County with her son, Isaiah.

Underwood took to Twitter to show off photos of her son having a blast with Elmo, Big Bird, Cookie Monster and the rest of the Sesame Street gang, and also to thank Sesame Place for a great time.