I used to have to do lots of post processing when I had the GH2 to get the miniature effect, but most of this footage is straight off the GH3 with a little bit of grading
It's been done a lot of times before, but I thought I'd try it out in my home town
no plugins, most of it is using the inbuilt miniature mode (in video mode) and the other clips are normal video, but I used standard after effects features to blur/saturate normal video (at 3x speed)