Super secret time travel for the purposes of behavior management

I took this picture of my daughter walking past this particular car in order to convince her at some point in the future that the photograph was taken in the late 1970’s.

“Time travel, Clara! Daddy is capable of time travel! So do you’re homework, damn it, or I’ll send you back to 1987 when Rick Astley’s music wasn't ironic but was actually taken seriously. Think about it! ”