The Micros and the Tinies

Going through a plastic shoebox of little toys, I ran across some very tiny toys, some so tiny they fit on my thumbnail.  Not having raised boys (we have 2 girls), they had only a slightly familiar feeling to me, and I don't really know where they came from. Some were probably in 50 cent bags of Hot Wheels we picked up at garage sales.

Hovering over the undersides of these, they are nearly all marked as "Micro Machines", which I have actually heard of (TV commercials!) but these aren't really things he collects, so I was surprised at the things that were tossed into this small "keep" box. There is an even "tinier than micro" red car (bottom row, left) that isn't a Micro Machine, but has no markings and is hollow but, it is a metal car. Super micro, but I have no idea what it is.