“This week, lots of little ghouls, superheroes and even robots were running around Google with their families, so we asked them to hang out around our parked cars. This gives our sensors and software extra practice at recognizing children in all their unique shapes and sizes, even when they’re in odd costumes,” Google said in the post.  Once a sensor detects a child, whether they are dressed in a costume or not, the software proceeds with extra caution, the company said.