The comic book frames can be found at the following locations.

Pop-In Shoppe: On the green couch, on the top floor.
Klassic Komix: Talk to the guy to receive the frame.
Photo Studio: On top of the light, to the right.
Main Street: On a telegraph pole, to the very right of the street.
Inside the School: On a speaker, on the top floor.
Science Lab: On the Planet Mobil, to the left.
Outside the School: On the wooden scaffolding, to the right of the school.
The Playground: Floating in the air, on top of the climbing wall.
Puffin Point: On top of the lighthouse.