from what i understand u buy stickers to match your family ie mom dad son daughter dog cat and put them on your car window. So the person behind you can see what a lovely family you have and how good your life is.
seriously though it is quite a good idea and people are eating this up.
although where i live every second car has frangipani stickers
they are going off in brisbane - almost every family car.
my gut feeling is they replaced the baby on board style sticker - a 'drive safely because there is a family in here' message. i think the stick figures could easily replaced by groovy colourful characters.
I hope you still read my comment, even if you post this for a very long time. I also once looking for stickers for cars or what they called bumper stickers and honestly, they have high quality output stickers.