We're all kids at heart in an amusement park.

The trailer for the animated family film "Wonder Park" centers on an actual kid, a girl named June, who used to be a fearless thrill-seeker but who has seemingly grown out of her creative playtime pursuits.

Then, she stumbles on an abandoned amusement park and uses her imagination (and the help of talking animals) to return the park to its former glory.

The voice cast includes Jennifer Garner, Mila Kunis, John Oliver, Matthew Broderick, Ken Jeong, and Kenan Thompson.

"Wonder Park" opens in theaters March 15, 2019.