Is it a bobblehead? Those are entertaining on long drives.
It's an old American Folk song... 'Plastic Jesus'... Made popular here by somebody a while back - I don't remember who exactly, though I expect it was the Mission Mountain Wood Band... But probably more popularly known by the performance of Paul Newman in Cool Hand Luke.
Anyhow, the song is a satirical look at some folk's faith that seemed quite apropos to this OP.
As to bobble head... I prefer the bobble hipped hula dancer, myself
